September 2026
CVE-2026-20343: Cisco Secure FMC Software Information Disclosure and Disk DoS VulnerabilityNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20343. Cisco explicitly lists a High CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20342: Cisco Secure FMC Software Arbitrary File Download VulnerabilityNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20342. Cisco explicitly lists a High CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20341: Cisco Secure FMC Software sftunnel Deserialization Root Command Execution VulnerabilityNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20341. Cisco explicitly lists a Critical CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20340: Cisco Secure FMC Software Deserialization Arbitrary Root Command Execution VulnerabilityNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20340. Cisco explicitly lists a High CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20336: Cisco ASA, FTD, and FMC hardening: Resource Lifetime Management VulnerabilitiesNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20336. Cisco does not separately state a CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20335: Cisco ASA, FTD, and FMC hardening: Incorrect Calculation VulnerabilitiesNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20335. Cisco does not separately state a CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20334: Cisco ASA, FTD, and FMC hardening: Coding Standards VulnerabilitiesNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20334. Cisco does not separately state a CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20333: Cisco ASA, FTD, and FMC hardening: Incorrect Comparison VulnerabilitiesNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20333. Cisco does not separately state a CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20332: Cisco ASA, FTD, and FMC hardening: Improper Access Control VulnerabilitiesNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20332. Cisco does not separately state a CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.
CVE-2026-20331: Cisco ASA, FTD, and FMC hardening: Protection Mechanism Failure VulnerabilitiesNew!!
Cisco published a Critical-rated advisory that includes CVE-2026-20331. Cisco does not separately state a CVE-specific SIR. TechGeeks scope, action, fixed-release guidance, evidence status, and primary Cisco sources.