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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-20082

CVE-2026-20082: 1 tracked advisory record across Cisco. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

Vendor advisory comparison

Cisco

1 advisory
  • Advisory severityHigh8.6

    High [CVE-2026-20082] Cisco Secure Firewall Adaptive Security Appliance Software TCP Flood Denial of Service Vulnerability

    cisco-sa-asa-dos-FCvLD6vRSource published Source updated

    A vulnerability in the handling of the embryonic connection limits in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause incoming TCP SYN packets to be dropped incorrectly. This vulnerability is due to improper handling of new, incoming TCP connections that are destined to management or data interfaces when the device is under a TCP SYN flood attack. An attacker could exploit this vulnerability by sending a crafted stream of traffic to an affected device. A successful exploit could allow the attacker to prevent all incom…

    Related products — impact not confirmed
    • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.4.14
    • FTD
    • FMC
    Source-reported affected versions
    • Scope: This vulnerability affects only Cisco Secure Firewall ASA Software Release 9.20.4.14, regardless of device configuration. The fixed software release for this vulnerability is Cisco Secure Firewall ASA Software Release 9.20.4.19.
    • Release 9.20.4.14 (first fixed: 9.20.4.19)
    Source-reported fixed versions
    • 9.20.4.19
    Mitigation guidance
    • Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
    • Release 9.20.4.14: upgrade to 9.20.4.19.
    Workarounds
    • There are no workarounds that address this vulnerability.
    Full advisory and evidenceOpen source bulletin

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