Riskcovery

CVE-2026-76445

Multiple Cisco Products Snort 3 Denial of Service Vulnerability

State
Published
Severity
5.3 Medium
Published
Oct 21, 2026
Updated
Oct 22, 2026
Reserved
Aug 19, 2026

Read the record on cve.org

Description

Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the detection engine to unexpectedly restart, resulting in a denial of service (DoS) condition.

The vulnerability is due to a flaw in logic handling when General Packet Radio Service (GPRS) Tunneling Protocol (GTP) extension headers are processed within the codec. An attacker could exploit this vulnerability by sending a crafted, fragmented UDP datagram that contains these headers to the Snort 3 Detection Engine of an affected device. A successful exploit could allow the attacker to cause the detection engine to enter an infinite loop, resulting in a DoS condition.

Scores

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

Weaknesses

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

Affected Products

ProductVersions
Cisco Open Source Snort3Cisco
  • 3.12.2.0Affected
  • 3.1.2.0Affected
  • 3.1.3.0Affected
  • 3.1.4.0Affected
  • 3.1.5.0Affected
  • 3.1.6.0Affected
  • 3.1.7.0Affected
  • 3.1.8.0Affected
  • 3.1.9.0Affected
  • 3.1.10.0Affected
  • 3.1.12.0Affected
  • 3.1.13.0Affected
  • 3.1.14.0Affected
  • 3.1.15.0Affected
  • 3.1.16.0Affected
  • 3.1.17.0Affected
  • 3.1.18.0Affected
  • 3.1.19.0Affected
  • 3.1.20.0Affected
  • 3.1.21.0Affected
  • 3.1.22.0Affected
  • 3.1.23.0Affected
  • 3.1.24.0Affected
  • 3.1.25.0Affected
  • 3.1.27.0Affected
  • and 80 more versions
Cisco Secure Firewall Threat Defense (FTD) SoftwareCisco
  • 7.0.0Affected
  • 7.0.0.1Affected
  • 7.0.1Affected
  • 7.0.1.1Affected
  • 7.0.2Affected
  • 7.2.0Affected
  • 7.0.2.1Affected
  • 7.0.3Affected
  • 7.2.0.1Affected
  • 7.0.4Affected
  • 7.2.1Affected
  • 7.0.5Affected
  • 7.3.0Affected
  • 7.2.2Affected
  • 7.2.3Affected
  • 7.3.1Affected
  • 7.2.4Affected
  • 7.0.6Affected
  • 7.2.5Affected
  • 7.2.4.1Affected
  • 7.3.1.1Affected
  • 7.4.0Affected
  • 7.0.6.1Affected
  • 7.2.5.1Affected
  • 7.4.1Affected
  • and 35 more versions
Cisco UTD SNORT IPS Engine SoftwareCisco
  • 17.12.1aAffected
  • 17.12.2Affected
  • 17.12.3Affected
  • 17.12.4Affected
  • 17.12.3aAffected
  • 17.15.1aAffected
  • 17.12.4aAffected
  • 17.15.2cAffected
  • 17.12.4bAffected
  • 17.15.2aAffected
  • 17.12.5Affected
  • 17.12.5aAffected
  • 17.15.3aAffected
  • 17.15.3Affected
  • 17.12.5bAffected
  • 17.12.5cAffected
  • 17.15.4Affected
  • 17.18.1Affected
  • 17.18.1aAffected
  • 17.12.6Affected
  • 17.15.4cAffected
  • 17.12.5dAffected
  • 17.18.2Affected
  • 17.15.5Affected
  • 17.15.5aAffected
  • and 7 more versions

References

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