Riskcovery

CVE-2025-20217

Cisco Firepower Threat Defense Intrusion Detection Denial of Service Vulnerability

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 packet inspection functionality of the Snort 3 Detection Engine of Cisco Secure Firewall 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 incorrect processing of traffic that is inspected by an affected device. An attacker could exploit this vulnerability by sending crafted traffic through the affected device. A successful exploit could allow the attacker to cause the affected device to enter an infinite loop while inspecting traffic, resulting in a DoS condition. The system watchdog will restart the Snort process automatically.

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-835 Loop with Unreachable Exit Condition ('Infinite Loop')

Affected Products

ProductVersions
Cisco Firepower Threat Defense SoftwareCisco
  • 7.1.0Affected
  • 7.1.0.1Affected
  • 7.2.0Affected
  • 7.1.0.2Affected
  • 7.2.0.1Affected
  • 7.2.1Affected
  • 7.3.0Affected
  • 7.2.2Affected
  • 7.2.3Affected
  • 7.3.1Affected
  • 7.1.0.3Affected
  • 7.2.4Affected
  • 7.2.5Affected
  • 7.2.4.1Affected
  • 7.3.1.1Affected
  • 7.4.0Affected
  • 7.2.5.1Affected
  • 7.4.1Affected
  • 7.2.6Affected
  • 7.4.1.1Affected
  • 7.2.7Affected
  • 7.2.5.2Affected
  • 7.3.1.2Affected
  • 7.2.8Affected
  • 7.6.0Affected
  • and 4 more versions

References

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