Riskcovery

CVE-2025-20135

Cisco Adaptive Security Appliance and Firepower Threat Defense Software DHCP Denial of Service Vulnerability

State
Published
Severity
4.3 Medium
Published
Aug 14, 2025
Updated
Aug 14, 2025
Reserved
Oct 10, 2024

Read the record on cve.org

Description

A vulnerability in the DHCP client functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to exhaust available memory.

This vulnerability is due to improper validation of incoming DHCP packets. An attacker could exploit this vulnerability by repeatedly sending crafted DHCPv4 packets to an affected device. A successful exploit could allow the attacker to exhaust available memory, which would affect availability of services and prevent new processes from starting, resulting in a Denial of Service (DoS) condition that would require a manual reboot. Note: On Cisco Secure FTD Software, this vulnerability does not affect management interfaces.

Scores

CVSSScoreVectorSource
3.14.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lcisco

Weaknesses

  • CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

ProductVersions
Cisco Adaptive Security Appliance (ASA) SoftwareCisco
  • 9.12.3Affected
  • 9.8.3Affected
  • 9.12.1Affected
  • 9.8.1Affected
  • 9.12.2Affected
  • 9.8.2.45Affected
  • 9.8.2Affected
  • 9.8.4Affected
  • 9.14.1Affected
  • 9.12.4Affected
  • 9.8.2.26Affected
  • 9.8.2.24Affected
  • 9.8.2.15Affected
  • 9.8.2.14Affected
  • 9.8.2.35Affected
  • 9.8.2.20Affected
  • 9.8.2.8Affected
  • 9.8.2.17Affected
  • 9.8.2.28Affected
  • 9.8.2.33Affected
  • 9.8.2.38Affected
  • 9.8.4.25Affected
  • 9.12.3.2Affected
  • 9.12.3.7Affected
  • 9.8.3.18Affected
  • and 184 more versions
Cisco Firepower Threat Defense SoftwareCisco
  • 6.2.3.14Affected
  • 6.4.0.1Affected
  • 6.2.3.7Affected
  • 6.2.3Affected
  • 6.4.0.2Affected
  • 6.2.3.9Affected
  • 6.2.3.1Affected
  • 6.2.3.2Affected
  • 6.4.0.5Affected
  • 6.2.3.10Affected
  • 6.4.0Affected
  • 6.4.0.3Affected
  • 6.2.3.6Affected
  • 6.4.0.4Affected
  • 6.2.3.15Affected
  • 6.2.3.5Affected
  • 6.2.3.4Affected
  • 6.2.3.3Affected
  • 6.2.3.8Affected
  • 6.4.0.6Affected
  • 6.2.3.11Affected
  • 6.2.3.12Affected
  • 6.2.3.13Affected
  • 6.4.0.7Affected
  • 6.4.0.8Affected
  • and 66 more versions

References

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