CVE-2025-20196: Cisco 807 Industrial Integrated Services Router Firmware

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in the Cisco IOx application hosting environment of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the Cisco IOx application hosting environment to stop responding, resulting in a denial of service (DoS) condition. This vulnerability is due to the improper handling of HTTP requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to cause the Cisco IOx application hosting environment to stop responding. The IOx process will need to be manually restarted to recover services.

Affected products

• Cisco 807 Industrial Integrated Services Router Firmware: before 15.9\(3\)m11 (fixed in 15.9\(3\)m11)
• Cisco 809 Industrial Integrated Services Router Firmware: before 15.9\(3\)m11 (fixed in 15.9\(3\)m11)
• Cisco 829 Industrial Integrated Services Router Firmware: before 15.9\(3\)m11 (fixed in 15.9\(3\)m11)
• Cisco CGR1000 Firmware: before 15.9\(3\)m12 (fixed in 15.9\(3\)m12)
• Cisco IC3000 Industrial Compute Gateway Firmware: before 1.5.2 (fixed in 1.5.2)
• Cisco IOS XE: version 16.1.1 only; version 16.1.2 only; version 16.1.3 only; version 16.2.1 only; version 16.2.2 only; version 16.3.1 only; …
• Cisco IR510 Wpan Firmware: affected versions not specified

Published 2025-05-07. Last modified 2026-06-17.