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

• CVE-2018-14634 Linux Kernel Integer Overflow Vulnerability
• CVE-2025-52691 SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
• CVE-2026-21509 Microsoft Office Security Feature Bypass Vulnerability
• CVE-2026-23760 SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability
• CVE-2026-24061 GNU InetUtils Argument 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. 

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Lazarus, a sophisticated North Korean-aligned hacking group also known as HIDDEN COBRA, has launched a new wave of targeted attacks against European drone manufacturers and defense contractors. The campaign, tracked as Operation DreamJob, emerged in late March 2025 and specifically targets organizations developing unmanned aerial vehicle technology across Central and Southeastern Europe. Researchers have identified […]

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