Vulnerability Description
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. For more information about this vulnerability, see the Details ["#details"] section of this advisory.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xr | 6.5.1 |
| Cisco | Asr 9001 | - |
| Cisco | Adaptive Security Appliance Software | >= 9.12, < 9.12.4.72 |
| Cisco | Ios | >= 12.2\(15\)b, <= 15.9\(3\)m11 |
| Cisco | Ios Xe | >= 3.2.0sg, <= 17.17.1 |
| Cisco | Firepower Threat Defense | >= 7.0.0, < 7.0.8 |
Related Weaknesses (CWE)
References
FAQ
What is CVE-2025-20363?
CVE-2025-20363 is a vulnerability with a CVSS score of 9.0 (CRITICAL). 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,...
How severe is CVE-2025-20363?
CVE-2025-20363 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-20363?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xr, Cisco Asr 9001, Cisco Adaptive Security Appliance Software, Cisco Ios, Cisco Ios Xe.