CVE-2025-20363

Published Sep 25, 2025 CVSS 3.1 · 9 Critical EPSS 7.2% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-31138 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.
History
Type Values Removed Values Added
First Time appeared Cisco secure Firewall Threat Defense
CPEs cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense:7.6.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_threat_defense:7.6.0:*:*:*:*:*:*:*
Vendors & Products Cisco firepower Threat Defense
Cisco secure Firewall Threat Defense
Type Values Removed Values Added
First Time appeared Cisco asr 9001
Cisco ios Xe
Cisco ios Xr
CPEs cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.1:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.5.2:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.6.3:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.7.1:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.7.2:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.7.3:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.8.1:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.8.2:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.9.1:*:*:*:*:*:x86:*
cpe:2.3:o:cisco:ios_xr:6.9.2:*:*:*:*:*:x86:*
Vendors & Products Cisco asr 9001
Cisco ios Xe
Cisco ios Xr
Type Values Removed Values Added
First Time appeared Cisco firepower Threat Defense
CPEs cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense:7.6.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
Vendors & Products Cisco firepower Threat Defense
Type Values Removed Values Added
First Time appeared Cisco
Cisco adaptive Security Appliance Software
Cisco firepower Threat Defense Software
Cisco ios
Cisco ios Xe Software
Cisco ios Xr Software
Vendors & Products Cisco
Cisco adaptive Security Appliance Software
Cisco firepower Threat Defense Software
Cisco ios
Cisco ios Xe Software
Cisco ios Xr Software
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'}