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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-20052

CVE-2026-20052: 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 severityMedium5.8

    Medium [CVE-2026-20052] Cisco Secure Firewall Threat Defense Software Snort 3 SSL Memory Management Denial of Service Vulnerability

    cisco-sa-ftd-snort3ssl-FBEKYXpHSource published Source updated

    A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a logic error in memory management when a device is performing Snort 3 SSL packet inspection. An attacker could exploit this vulnerability by sending crafted SSL packets through an established connection to be parsed by the Snort 3 Detection Engine. A successful exploit could allow the attacker to cause a denial of service (DoS) c…

    Related products — impact not confirmed
    • Cisco Secure Firewall Threat Defense (FTD) Software 7.4.0
    • Cisco Secure Firewall Threat Defense (FTD) Software 7.4.1.1
    • Cisco Secure Firewall Threat Defense (FTD) Software 7.4.2.1
    • Cisco Secure Firewall Threat Defense (FTD) Software 7.6.0

    2 more entries in the full advisory.

    Source-reported affected versions
    • Scope: At the time of publication, this vulnerability affected Cisco devices if they were running a vulnerable release of Cisco Secure FTD Software and the following conditions were met:
    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Workarounds
    • There are no workarounds that address this vulnerability.
    Full advisory and evidenceOpen source bulletin

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