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    CVE-2026-20334

    As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20334 are related to issues concerning improper adherence to coding standards that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-710.

    Published:Sep 16, 2026
    Last Modified:Sep 19, 2026
    EPS:Sep 16, 2026
    EPSS Score:0.00264
    CVSS Score:8.4

    Affected Products

    Vendor
    Cisco
    Product
    Adaptive Security Appliance Software
    Vendor
    Cisco
    Product
    Secure Firewall Management Center
    Vendor
    Cisco
    Product
    Secure Firewall Threat Defense

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-20222 (CVSS 7.4) — A vulnerability in the EIGRP implementation in Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwar…
    CVE-2026-20336 (CVSS 8.8) — As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Sec…
    CVE-2026-20249 (CVSS 8.6) — A vulnerability in the certification authentication feature of Internet Key Exchange version 2 (IKEv2) fo…
    CVE-2026-20335 (CVSS 8.1) — As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Sec…
    CVE-2026-20330 (CVSS 9.9) — As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Sec…
    CVE-2026-20329 (CVSS 9.9) — As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Sec…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High