Riskcovery

CVE-2025-20239

State
Published
Severity
8.6 High
Published
Aug 14, 2025
Updated
Aug 14, 2025
Reserved
Oct 10, 2024

Read the record on cve.org

Description

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE Software, Secure Firewall Adaptive Security Appliance (ASA) Software, and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS) condition. This vulnerability is due to a lack of proper processing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. In the case of Cisco IOS and IOS XE Software, a successful exploit could allow the attacker to cause the device to reload unexpectedly. In the case of Cisco ASA and FTD Software, a successful exploit could allow the attacker to partially exhaust system memory, causing system instability such as being unable to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from this condition.

Scores

CVSSScoreVectorSource
3.18.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hcisco

Weaknesses

  • CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

ProductVersions
IOSCisco
  • 15.2(4)EAffected
  • 15.2(4)E1Affected
  • 15.2(4)E2Affected
  • 15.2(5)EAffected
  • 15.2(4)E3Affected
  • 15.2(5)E1Affected
  • 15.2(5b)EAffected
  • 15.2(5a)E1Affected
  • 15.2(4)E4Affected
  • 15.2(5)E2Affected
  • 15.2(6)EAffected
  • 15.2(4)E5Affected
  • 15.2(5)E2cAffected
  • 15.2(6)E0aAffected
  • 15.2(6)E1Affected
  • 15.2(6)E0cAffected
  • 15.2(4)E6Affected
  • 15.2(6)E2Affected
  • 15.2(4)E7Affected
  • 15.2(7)EAffected
  • 15.2(4)E8Affected
  • 15.2(6)E2aAffected
  • 15.2(7)E1Affected
  • 15.2(7)E0aAffected
  • 15.2(7)E0bAffected
  • and 213 more versions
Cisco Adaptive Security Appliance (ASA) SoftwareCisco
  • 9.8.1Affected
  • 9.8.1.5Affected
  • 9.8.1.7Affected
  • 9.8.2Affected
  • 9.8.2.8Affected
  • 9.8.2.14Affected
  • 9.8.2.15Affected
  • 9.8.2.17Affected
  • 9.8.2.20Affected
  • 9.8.2.24Affected
  • 9.8.2.26Affected
  • 9.8.2.28Affected
  • 9.8.2.33Affected
  • 9.8.2.35Affected
  • 9.8.2.38Affected
  • 9.8.3.8Affected
  • 9.8.3.11Affected
  • 9.8.3.14Affected
  • 9.8.3.16Affected
  • 9.8.3.18Affected
  • 9.8.3.21Affected
  • 9.8.3Affected
  • 9.8.3.26Affected
  • 9.8.3.29Affected
  • 9.8.4Affected
  • and 195 more versions
Cisco IOS XE SoftwareCisco
  • 3.14.0SAffected
  • 3.14.1SAffected
  • 3.14.2SAffected
  • 3.14.3SAffected
  • 3.14.4SAffected
  • 3.15.0SAffected
  • 3.15.1SAffected
  • 3.15.2SAffected
  • 3.15.1cSAffected
  • 3.15.3SAffected
  • 3.15.4SAffected
  • 3.16.0SAffected
  • 3.16.1SAffected
  • 3.16.1aSAffected
  • 3.16.2SAffected
  • 3.16.2aSAffected
  • 3.16.0cSAffected
  • 3.16.3SAffected
  • 3.16.2bSAffected
  • 3.16.3aSAffected
  • 3.16.4SAffected
  • 3.16.4aSAffected
  • 3.16.4bSAffected
  • 3.16.5SAffected
  • 3.16.4dSAffected
  • and 309 more versions
Cisco Firepower Threat Defense SoftwareCisco
  • 6.2.3Affected
  • 6.2.3.1Affected
  • 6.2.3.2Affected
  • 6.2.3.3Affected
  • 6.2.3.4Affected
  • 6.2.3.5Affected
  • 6.2.3.6Affected
  • 6.2.3.7Affected
  • 6.2.3.8Affected
  • 6.2.3.10Affected
  • 6.2.3.11Affected
  • 6.2.3.9Affected
  • 6.2.3.12Affected
  • 6.2.3.13Affected
  • 6.2.3.14Affected
  • 6.2.3.15Affected
  • 6.2.3.16Affected
  • 6.2.3.17Affected
  • 6.2.3.18Affected
  • 6.6.0Affected
  • 6.6.0.1Affected
  • 6.6.1Affected
  • 6.6.3Affected
  • 6.6.4Affected
  • 6.6.5Affected
  • and 69 more versions

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.