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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-20222

CVE-2026-20222: 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 severityHigh7.4

    High [CVE-2026-20222] Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software EIGRP Denial of Service Vulnerability

    cisco-sa-asaftd-eigrp-dos-GOhNejSjSource published Source updated

    A vulnerability in the EIGRP implementation in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper resource management when handling EIGRP update messages. An attacker could exploit this vulnerability by sending crafted EIGRP updates at a high rate to an affected device. A successful exploit could allow the attacker to trigger a memory leak that will eventually cause the affected device to reload unexpectedly. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This…

    Affected products in this advisory
    • Secure Firewall Adaptive Security Appliance (ASA) Software
    • Firepower 2100 Series
    • Firepower 1000 Series
    • 3000 Series Industrial Security Appliances (ISA)

    4 more entries in the full advisory.

    Source-reported affected versions
    • Scope: This vulnerability affects Cisco devices if they are running a vulnerable release of Cisco Secure Firewall ASA Software or Cisco Secure FTD Software and have EIGRP enabled.
    • Release N/A (first fixed: 9.18 and earlier / 9.20)
    • Release 9.20.4.49 (first fixed: 9.20.4.235 / 9.22.3.191)
    • Release 9.23 (first fixed: 9.22.3.26 / 9.23.1.211)

    5 more entries in the full advisory.

    Source-reported fixed versions
    • 9.18 and earlier / 9.20
    • 9.20.4.235 / 9.22.3.191
    • 9.22.3.26 / 9.23.1.211
    • 9.23.1.47 / 9.24.1.221

    4 more entries in the full advisory.

    Mitigation guidance
    • This vulnerability is due to improper resource management when handling EIGRP update messages.
    Workarounds
    • There are no workarounds that address this vulnerability.
    • To reduce the risk of successful exploitation of this vulnerability and as a general hardening best practice, enable EIGRP authentication throughout the network. For more information, see Enable EIGRP Authentication on an Interface.
    Full advisory and evidenceOpen source bulletin

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