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CVE-2024-20426

HIGH · CVSS 8.6EPSS 0.5%EU EUVD

A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Key facts

CVSS score
8.6 (v3.1)
Severity
HIGH
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness (CWE)
CWE-476
EPSS score
0.5% (43th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2024-18141)
Published
October 23, 2024
NVD last modified
August 11, 2026
Status
Analyzed

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2024-18141 in the EU Vulnerability Database. Last updated in EUVD on October 24, 2024.

View on the EU Vulnerability Database

Affected products

  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / adaptive security appliance software
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense

and 4 more…

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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