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CVE-2026-20222

HIGHCVSS 7.4/10

Last modified

CVE-2026-20222 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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.

Description

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.

Metrics

CVSS 3.1
7.4/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
CiscoCisco Secure Firewall Adaptive Security Appliance (ASA) Software9.19.1; 9.19.1.5; 9.19.1.9; 9.19.1.12; 9.19.1.18; 9.20.1; 9.19.1.22; 9.20.1.5; 9.19.1.24; 9.20.2; 9.19.1.27; 9.20.2.10; 9.19.1.28; 9.20.2.21; 9.19.1.31; 9.20.2.22; 9.20.3; 9.23.1; 9.22.1.1; 9.20.3.4; 9.20.3.7; 9.19.1.37; 9.20.3.9; 9.19.1.38; 9.22.1.3; 9.20.3.10; 9.22.1.2; 9.20.3.13; 9.22.1.6; 9.22.2; 9.20.3.16; 9.19.1.42; 9.23.1.3; 9.20.3.20; 9.22.2.4; 9.23.1.7; 9.20.4; 9.22.2.9; 9.23.1.13; 9.20.4.7; 9.22.2.13; 9.20.4.10; 9.23.1.19; 9.22.2.14; 9.24.1; 9.23.1.22; 9.20.4.14; 9.22.2.20; 9.20.4.19; 9.23.1.26; 9.22.2.32; 9.22.3; 9.24.1.5; 9.20.4.22; 9.24.1.9; 9.20.4.28; 9.22.3.5; 9.23.1.195; 9.20.4.30; 9.24.1.155; 9.23.1.32; 9.24.1.11; 9.20.4.34; 9.20.4.235
CiscoCisco Secure Firewall Threat Defense (FTD) Software7.3.0; 7.3.1; 7.3.1.1; 7.4.0; 7.4.1; 7.4.1.1; 7.3.1.2; 7.6.0; 7.4.2; 7.4.2.1; 7.7.0; 7.4.2.2; 7.6.1; 7.4.2.3; 7.6.2; 7.7.10; 7.7.11; 7.6.2.1; 7.7.10.1; 7.4.2.4; 7.4.3; 7.6.4; 10.0.0; 7.4.4; 7.4.7

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-20222?
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.
How severe is CVE-2026-20222?
CVE-2026-20222 has a CVSS score of 7.4/10 (HIGH severity).
How do I fix CVE-2026-20222?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST