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CVE-2025-20217

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CVE-2025-20217

Published: Aug 14, 2025

Modified: Aug 14, 2025

PUBLISHED

CVSS v3.1

8.6

HIGH

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.

VendorProductVersions

Cisco

Cisco Firepower Threat Defense Software

affected
7.1.0
affected
7.1.0.1
affected
7.2.0
affected
7.1.0.2
affected
7.2.0.1

+24 more versions

Weaknesses (CWE)

CWE-835

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

References

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