US-CERT Feed

CISA has added five new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2017-7921 Hikvision Multiple Products Improper Authentication Vulnerability
• CVE-2021-22681 Rockwell Multiple Products Insufficient Protected Credentials Vulnerability
• CVE-2021-30952 Apple Multiple Products Integer Overflow or Wraparound Vulnerability
• CVE-2023-41974 Apple iOS and iPadOS Use-After-Free Vulnerability
• CVE-2023-43000 Apple Multiple products Use-After-Free Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2026-21385 Qualcomm Multiple Chipsets Memory Corruption Vulnerability
• CVE-2026-22719 Broadcom VMware Aria Operations Command Injection Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. 

• CVE-2022-20775 Cisco Catalyst SD-WAN Path Traversal Vulnerability
• CVE-2026-20127 Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability 

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. 

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information. 

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

The purpose of this Alert is to provide resources for organizations with Cisco Software-Defined Wide-Area Networking (SD-WAN) systems, including Federal Civilian Executive Branch (FCEB) agencies, to address ongoing exploitation of multiple vulnerabilities. Notably, the Cybersecurity and Infrastructure Security Agency (CISA) has added CVE-2026-20127 and CVE-2022-20775 to its Known Exploited Vulnerabilities (KEV) Catalog on Feb. 25, 2026. As a result of the malicious cyber activity and vulnerabilities involving Cisco SD-WAN systems, CISA has outlined requirements for FCEB agencies in Emergency Directive (ED) 26-03 to inventory Cisco SD-WAN systems, update them, and assess compromise.

CISA and partners have observed malicious cyber actors targeting and compromising Cisco SD-WAN systems of organizations, globally. These actors have been observed exploiting a previously undisclosed authentication bypass vulnerability, CVE-2026-20127, for initial access before escalating privileges using CVE-2022-20775 and establishing long-term persistence in Cisco SD-WAN systems.

CISA, National Security Agency (NSA), and international partners Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC), Canadian Centre for Cyber Security (Cyber Centre), New Zealand National Cyber Security Centre (NCSC-NZ), and United Kingdom National Cyber Security Centre (NCSC-UK), hereafter the “authoring organizations,” strongly urge network defenders to immediately 1) inventory all in-scope Cisco SD-WAN systems, 2) collect artifacts, including virtual snapshots and logs off of SD-WAN systems to support threat hunt activities, 3) fully patch Cisco SD-WAN systems with available updates, 4) hunt for evidence of compromise, and 5) concurrently review Cisco’s latest security advisories, Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability and Cisco Catalyst SD-WAN Vulnerabilities, and implement Cisco’s SD-WAN Hardening Guidance.1

To address malicious activity involving vulnerable Cisco SD-WAN systems, CISA issued Emergency Directive 26-03: Mitigate Vulnerabilities in Cisco SD-WAN Systems, which outlines requirements for FCEB agencies to inventory Cisco SD-WAN systems, update them, and assess compromise. Further, CISA released Supplemental Direction ED 26-03: Hunt and Hardening Guidance for Cisco SD-WAN Systems to provide prescriptive actions for FCEB agencies. 

Cisco’s Catalyst SD-WAN Hardening Guide recommends that network defenders address:

• Network perimeter controls: Ensure control components are behind a firewall, isolate virtual private network (VPN) 512 interfaces, and use internet protocol (IP) blocks for manually provisioned edge IPs.
• SD-WAN manager access: Replace the self-signed certificate for the web user interface.
• Control and data plane security: Use pairwise keys.
• Session timeout: Limit to the shortest period possible.
• Logging: Forward to a remote syslog server.

CISA and the authoring organizations are providing the following resources:  

• CISA: Emergency Directive 26-03: Mitigate Vulnerabilities in Cisco SD-WAN Systems
• CISA: Supplemental Direction ED 26-03: Hunt and Hardening Guidance for Cisco SD-WAN Systems
• Cisco: Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
• Cisco: Cisco Catalyst SD-WAN Vulnerabilities
• Cisco: Cisco Catalyst SD-WAN Hardening Guide
• ASD’s ACSC: Cisco SD-WAN Threat Hunt Guide, co-sealed by CISA, NSA, Cyber Centre, NCSC-NZ, and NCSC-UK. This guide, based on investigative data, supports network defenders’ detection of and response to the malicious actors’ threat activity

Acknowledgements

NSA, ASD’s ACSC, Cyber Centre, NCSC-NZ, and NCSC-UK contributed to this alert.

Disclaimer

The information in this report is being provided “as is” for informational purposes only. CISA does not endorse any commercial entity, product, company, or service, including any entities, products, or services linked within this document. Any reference to specific commercial entities, products, processes, or services by service mark, trademark, manufacturer, or otherwise, does not constitute or imply endorsement, recommendation, or favoring by CISA. 

Notes 

1 Cisco Security, “Cisco Catalyst SD-WAN Hardening Guide,” last modified February 9, 2026, https://sec.cloudapps.cisco.com/security/center/resources/Cisco-Catalyst-SD-WAN-HardeningGuide

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2026-25108 Soliton Systems K.K. FileZen OS Command Injection Vulnerability

This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Vulnerability
• CVE-2025-68461 RoundCube Webmail Cross-site Scripting Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. 

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2021-22175 GitLab Server-Side Request Forgery (SSRF) Vulnerability
• CVE-2026-22769 Dell RecoverPoint for Virtual Machines (RP4VMs) Use of Hard-coded Credentials Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. 

CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2008-0015 Microsoft Windows Video ActiveX Control Remote Code Execution Vulnerability
• CVE-2020-7796 Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability
• CVE-2024-7694 TeamT5 ThreatSonar Anti-Ransomware Unrestricted Upload of File with Dangerous Type Vulnerability
• CVE-2026-2441 Google Chromium CSS Use-After-Free Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. 

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2026-1731 BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

• CVE-2024-43468 Microsoft Configuration Manager SQL Injection Vulnerability
• CVE-2025-15556 Notepad++ Download of Code Without Integrity Check Vulnerability
• CVE-2025-40536 SolarWinds Web Help Desk Security Control Bypass Vulnerability
• CVE-2026-20700 Apple Multiple Buffer Overflow Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. 

CISA has added six new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. 

• CVE-2026-21510 Microsoft Windows Shell Protection Mechanism Failure Vulnerability
• CVE-2026-21513 Microsoft MSHTML Framework Security Feature Bypass Vulnerability
• CVE-2026-21514 Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability
• CVE-2026-21519 Microsoft Windows Type Confusion Vulnerability
• CVE-2026-21525 Microsoft Windows NULL Pointer Dereference Vulnerability
• CVE-2026-21533 Windows Remote Desktop Services Elevation of Privilege Vulnerability 

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. 

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information. 

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. 

The purpose of this Alert is to amplify Poland’s Computer Emergency Response Team (CERT Polska’s) Energy Sector Incident Report published on Jan. 30, 2026, and highlight key mitigations for Energy Sector stakeholders. 

In December 2025, a malicious cyber actor(s) targeted and compromised operational technology (OT) and industrial control systems (ICS) in Poland’s Energy Sector—specifically renewable energy plants, a combined heat and power plant, and a manufacturing sector company—in a cyber incident. The malicious cyber activity highlights the need for critical infrastructure entities with vulnerable edge devices to act now to strengthen their cybersecurity posture against cyber threat activities targeting OT and ICS.

A malicious cyber actor(s) gained initial access in this incident through vulnerable internet-facing edge devices, subsequently deploying wiper malware and causing damage to remote terminal units (RTUs). The malicious cyber activity caused loss of view and control between facilities and distribution system operators, destroyed data on human machine interfaces (HMIs), and corrupted system firmware on OT devices. While the affected renewable energy systems continued production, the system operator could not control or monitor them according to their intended design.1

CERT Polska’s incident report highlights:

• Vulnerable edge devices remain a prime target for threat actors.
  • As indicated by CISA’s Binding Operational Directive (BOD) 26-02: Mitigating Risk From End-of-Support Edge Devices, end-of-support edge devices pose significant risks.
• OT devices without firmware verification can be permanently damaged.
  • Operators should prioritize updates that allow firmware verification when available; if updates are not immediately feasible, ensure that cyber incident response plans account for inoperative OT devices to mitigate prolonged outages.
• Threat actors leveraged default credentials, a vulnerability not limited to specific vendors, to pivot onto the HMI and RTUs.
  • Operators should immediately change default passwords and establish requirements for integrators or OT suppliers to enforce password changes in the future.

CISA and the Department of Energy’s Office of Cybersecurity, Energy Security, and Emergency Response (DOE CESER) urge OT asset owners and operators to review the following resources for more information about the malicious activity and mitigations:

• CERT Polska’s Energy Sector Incident Report - 29 December 2025.
• CISA’s joint fact sheet with FBI, EPA, and DOE Primary Mitigations to Reduce Cyber Threats to Operational Technology.
• DOE’s Energy Threat Analysis Center’s threat advisories.

Acknowledgements

DOE CESER and CERT Polska contributed to this Alert.

Disclaimer 

The information in this report is being provided “as is” for informational purposes only. CISA does not endorse any commercial entity, product, company, or service, including any entities, products, or services linked within this document. Any reference to specific commercial entities, products, processes, or services by service mark, trademark, manufacturer, or otherwise, does not constitute or imply endorsement, recommendation, or favoring by CISA. 

Notes

1. CERT Polska, “Energy Sector Incident Report - 29 December 2025,” Naukowa i Akademicka Sieć Komputerowa Poland, last modified January 30, 2026, https://cert.pl/en/posts/2026/01/incident-report-energy-sector-2025/.