CISA Adds Five Exploited Vulnerabilities to KEV Catalog Including AhsayCBS Authentication and Command Injection Flaws

The US Cybersecurity and Infrastructure Security Agency (CISA) has added five vulnerabilities to its Known Exploited Vulnerabilities catalog after confirming active exploitation in the wild. Four vulnerabilities were registered on October 14, 2026, and one additional entry followed on October 15. Among the newly listed issues are two critical flaws affecting the AhsayCBS backup management server: CVE-2026-105133, an authentication bypass in the API, and CVE-2026-105134, a command injection vulnerability in the replication feature. When chained together, the pair allows unauthenticated remote attackers to execute arbitrary operating system commands. Vendor Ahsay has released hotfixes in versions 10.3.4.45 and 9.15.2.70 because standard patches cannot fully address the issues. The advisory also references vulnerabilities in Atlassian products and multiple network security solutions from other vendors.

Security NEXTOctober 16, 2026Translated from Japanese

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The US Cybersecurity and Infrastructure Security Agency (CISA) has issued an alert regarding the confirmed exploitation of five vulnerabilities affecting Atlassian products, AhsayCBS, and several other network security solutions from multiple vendors.

On October 14, 2026, CISA added four vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, followed by one additional entry on October 15. The agency emphasized that these flaws are already being actively exploited and urged organizations to apply mitigations immediately.

Two of the October 14 entries concern the backup management server AhsayCBS. CVE-2026-105133 is an authentication bypass vulnerability in the product’s API, while CVE-2026-105134 is a command injection flaw in the replication functionality. When exploited together, the vulnerabilities allow an attacker to execute arbitrary operating system commands without requiring any authentication.

Ahsay stated that conventional patches are insufficient to remediate the issues and has therefore released dedicated hotfixes: AhsayCBS 10.3.4.45 and AhsayCBS 9.15.2.70.

The remaining vulnerabilities added to the KEV list involve Atlassian products and multiple network security appliances from other vendors, although specific technical details for those entries were not expanded in the current advisory.

CISA Atlassian AhsayCBS CVE-2026-105133 CVE-2026-105134

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