7.4

CVE-2026-20222: cisco cisco secure firewall adaptive security appliance (asa) software

CVSS: 7.4v3.1HighAwaiting analysis
Published 16-09-2026Last modified 18-09-2026
Open JSON

Vulnerability summary

CVE-2026-20222 is a high (CVSS 7.4) vulnerability in cisco cisco secure firewall adaptive security appliance (asa) software. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-09-2026
    PublishedVulnerability first disclosed.
  2. 18-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • cisco 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
  • cisco 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

1 vendor · 2 products

References

1 links