A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code on an affected device.

This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker with valid VPN user credentials could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of the affected device.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is in the KEV database since Sept. 25, 2025.

The EPSS score is 0.0946.

Exploitation active

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Cisco Subscribe
Adaptive Security Appliance Software Subscribe
Firepower Threat Defense Subscribe
Firepower Threat Defense Software Subscribe

Configuration 1 [-]

OR cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*

Configuration 2 [-]

OR cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense:7.6.0:*:*:*:*:*:*:*

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Cisco Subscribe
Adaptive Security Appliance Software Subscribe
Firepower Threat Defense Software Subscribe
Advisories
Source ID Title
EUVD EUVD EUVD-2025-31140 A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker with valid VPN user credentials could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of the affected device.
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-z5xP8EUB cve-icon cve-icon
https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks cve-icon cve-icon
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20333 cve-icon cve-icon
History

Wed, 22 Oct 2025 08:15:00 +0900

Type Values Removed Values Added
References

Wed, 22 Oct 2025 05:30:00 +0900

Type Values Removed Values Added
References

Wed, 22 Oct 2025 04:30:00 +0900

Type Values Removed Values Added
References

Fri, 26 Sep 2025 23:15:00 +0900

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

Fri, 26 Sep 2025 20:45:00 +0900

Type Values Removed Values Added
First Time appeared Cisco
Cisco adaptive Security Appliance Software
Cisco firepower Threat Defense Software
Vendors & Products Cisco
Cisco adaptive Security Appliance Software
Cisco firepower Threat Defense Software

Fri, 26 Sep 2025 03:15:00 +0900

Type Values Removed Values Added
References

Fri, 26 Sep 2025 02:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 26 Sep 2025 01:30:00 +0900

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2025-09-25T00:00:00+00:00', 'dueDate': '2025-09-26T00:00:00+00:00'}

Fri, 26 Sep 2025 01:15:00 +0900

Type Values Removed Values Added
Description A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker with valid VPN user credentials could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of the affected device.
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2025-11-05T21:03:29.299Z

Reserved: 2024-10-10T19:15:13.255Z

Link: CVE-2025-20333

cve-icon Vulnrichment

Updated: 2025-09-25T17:04:17.013Z

cve-icon NVD

Status : Analyzed

Published: 2025-09-25T16:15:32.073

Modified: 2025-10-28T13:58:58.610

Link: CVE-2025-20333

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-26T20:35:39Z

Weaknesses