Multiple Cisco products affected by Remote Code Execution Vulnerability (CVE-2025-20363)

CVE number = CVE-2025-20363

A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure Firewall Threat Defense (FTD) Software, Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, remote attacker (Cisco ASA and FTD Software) or authenticated, remote attacker (Cisco IOS, IOS XE, and IOS XR Software) with low user privileges to execute arbitrary code on an affected device.

This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web service on an affected device after obtaining additional information about the system, overcoming exploit mitigations, or both. A successful exploit could allow the attacker to execute arbitrary code as root, which may lead to the complete compromise of the affected device.

This vulnerability affects the following Cisco products:

• Secure Firewall ASA Software and Secure Firewall FTD Software if they have one or more of the vulnerable configurations that are listed in the following tables. (CSCwo18850)
• IOS Software if they have the Remote Access SSL VPN feature enabled. (CSCwo35704)
• IOS XE Software if they have the Remote Access SSL VPN feature enabled. (CSCwo35704, CSCwo35779)
• IOS XR Software (32-bit) if it is running on Cisco ASR 9001 Routers that have the HTTP server enabled. (CSCwo49562)

This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-code-exec-WmfP3h3O