CVE-2023-20071: Cisco Cyber Vision

Medium severity, CVSS 5.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. This vulnerability is due to a flaw in the FTP module of the Snort detection engine. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and deliver a malicious payload.

Affected products

• Cisco Cyber Vision: before 4.1.3 (fixed in 4.1.3)
• Cisco Meraki Mx Security Appliance Firmware: affected versions not specified
• Cisco Secure Firewall Threat Defense: before 6.4.0.17 (fixed in 6.4.0.17); from 6.5.0, before 7.0.6 (fixed in 7.0.6); from 7.1.0, before 7.2.4 (fixed in 7.2.4); from 7.3.0, before 7.3.1.2 (fixed in 7.3.1.2); from 6.7.0, before 7.0.5 (fixed in 7.0.5); from 7.1.0, before 7.1.0.3 (fixed in 7.1.0.3); …
• Cisco Unified Threat Defense: from 17.3, before 17.3.8 (fixed in 17.3.8); from 17.6, before 17.6.6 (fixed in 17.6.6); from 17.9, before 17.9.4 (fixed in 17.9.4); from 17.11, before 17.11.1a (fixed in 17.11.1a); from 17.12, before 17.12.1a (fixed in 17.12.1a)

Published 2023-11-01. Last modified 2026-08-11.