CISA placed the actively exploited F5 BIG-IP APM heap-based buffer overflow CVE-2026-94127 into its KEV catalog on 2026-09-22 with a three-day remediation deadline for federal agencies. The zero-day enables unauthenticated remote code execution on systems running both an access policy and OAuth profile on the same virtual server, prompting immediate patching and forensic triage.
The Canadian Centre for Cyber Security and NCSC Netherlands confirm the flaw is being exploited as a zero-day.
Both CISA and the NCSC advise checking for indicators of compromise prior to remediation.
Enterprise teams running BIG-IP APM should treat this as an emergency patch; the combination of zero-day exploitation, high CVSS, and short BOD 26-04 window leaves little margin before ransomware actors weaponize it.
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CISA added Linux Kernel vulnerability CVE-2025-39682 to its Known Exploited Vulnerabilities catalog on 2026-09-18 with a federal remediation deadline of 2026-09-21. The flaw in the TLS receive path allows zero-length records to bypass recvmsg() handling, leading to incorrect processing assumptions, and agencies must apply vendor mitigations per BOD 26-04 or discontinue use of impacted EoL products.
CISA added CVE-2026-76461, a SQL injection flaw in the Cisco email security appliance, to its Known Exploited Vulnerabilities catalog on 2026-09-14. Federal agencies have until 2026-09-17 to apply vendor mitigations under BOD 26-04, with forensic triage required.
CISA added CVE-2026-21962, an improper access control flaw in Oracle HTTP Server and the Oracle Weblogic Server Proxy Plug-in, to its Known Exploited Vulnerabilities catalog on 2026-08-24. Federal agencies have until 2026-08-27 to apply mitigations per vendor instructions or discontinue use.
CISA added the actively exploited CVE-2026-69836 deserialization vulnerability in Microsoft Entra ID to its Known Exploited Vulnerabilities catalog on 2026-08-21 with a federal remediation deadline of 2026-08-24. The CVSS 10.0 flaw, already mitigated server-side by Microsoft, allows unauthenticated remote code execution and requires no customer action.
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