A vulnerability in the management and VPN web servers of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition.

This vulnerability is due to improper validation of user-supplied input on an interface with VPN web services. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on an affected device. A successful exploit could allow the attacker to cause a DoS condition when the device reloads.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00032.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Adaptive Security Appliance (ASA) Software unknown
Version Status Constraints
9.12.3 affected —
9.8.3 affected —
9.12.1 affected —
9.8.1 affected —
9.12.2 affected —
9.8.2.45 affected —
9.8.2 affected —
9.8.4 affected —
9.14.1 affected —
9.12.4 affected —
9.8.2.26 affected —
9.8.2.24 affected —
9.8.2.15 affected —
9.8.2.14 affected —
9.8.2.35 affected —
9.8.2.20 affected —
9.8.2.8 affected —
9.8.2.17 affected —
9.8.2.28 affected —
9.8.2.33 affected —
9.8.2.38 affected —
9.8.4.25 affected —
9.12.3.2 affected —
9.12.3.7 affected —
9.8.3.18 affected —
9.8.3.14 affected —
9.8.4.15 affected —
9.8.4.8 affected —
9.8.1.7 affected —
9.8.3.29 affected —
9.14.1.10 affected —
9.12.2.5 affected —
9.8.4.22 affected —
9.12.3.12 affected —
9.8.4.7 affected —
9.8.4.17 affected —
9.8.3.16 affected —
9.8.4.20 affected —
9.8.3.11 affected —
9.12.1.3 affected —
9.8.4.3 affected —
9.12.2.4 affected —
9.8.4.12 affected —
9.12.1.2 affected —
9.8.3.26 affected —
9.8.1.5 affected —
9.12.2.9 affected —
9.12.3.9 affected —
9.8.3.21 affected —
9.8.4.10 affected —
9.12.2.1 affected —
9.12.4.2 affected —
9.14.1.6 affected —
9.8.3.8 affected —
9.14.1.15 affected —
9.14.1.19 affected —
9.8.4.26 affected —
9.12.4.4 affected —
9.14.1.30 affected —
9.8.4.29 affected —
9.12.4.7 affected —
9.14.2 affected —
9.12.4.8 affected —
9.8.4.32 affected —
9.12.4.10 affected —
9.14.2.4 affected —
9.14.2.8 affected —
9.12.4.13 affected —
9.8.4.33 affected —
9.14.2.13 affected —
9.8.4.34 affected —
9.12.4.18 affected —
9.8.4.35 affected —
9.14.2.15 affected —
9.12.4.24 affected —
9.16.1 affected —
9.8.4.39 affected —
9.14.3 affected —
9.12.4.26 affected —
9.16.1.28 affected —
9.14.3.1 affected —
9.12.4.29 affected —
9.14.3.9 affected —
9.16.2 affected —
9.12.4.30 affected —
9.16.2.3 affected —
9.8.4.40 affected —
9.14.3.11 affected —
9.12.4.35 affected —
9.8.4.41 affected —
9.14.3.13 affected —
9.16.2.7 affected —
9.12.4.37 affected —
9.14.3.15 affected —
9.17.1 affected —
9.16.2.11 affected —
9.14.3.18 affected —
9.16.2.13 affected —
9.12.4.39 affected —
9.12.4.38 affected —
9.8.4.43 affected —
9.14.4 affected —
9.16.2.14 affected —
9.17.1.7 affected —
9.12.4.40 affected —
9.16.3.3 affected —
9.14.4.6 affected —
9.16.3 affected —
9.16.3.14 affected —
9.17.1.9 affected —
9.14.4.7 affected —
9.12.4.41 affected —
9.17.1.10 affected —
9.8.4.44 affected —
9.18.1 affected —
9.12.4.47 affected —
9.14.4.12 affected —
9.16.3.15 affected —
9.18.1.3 affected —
9.17.1.11 affected —
9.12.4.48 affected —
9.14.4.13 affected —
9.18.2 affected —
9.16.3.19 affected —
9.17.1.13 affected —
9.12.4.50 affected —
9.14.4.14 affected —
9.17.1.15 affected —
9.8.4.45 affected —
9.12.4.52 affected —
9.14.4.15 affected —
9.16.3.23 affected —
9.18.2.5 affected —
9.16.4 affected —
9.12.4.54 affected —
9.14.4.17 affected —
9.8.4.46 affected —
9.17.1.20 affected —
9.18.2.7 affected —
9.19.1 affected —
9.16.4.9 affected —
9.12.4.55 affected —
9.18.2.8 affected —
9.14.4.22 affected —
9.16.4.14 affected —
9.8.4.48 affected —
9.18.3 affected —
9.19.1.5 affected —
9.14.4.23 affected —
9.12.4.56 affected —
9.16.4.18 affected —
9.17.1.30 affected —
9.19.1.9 affected —
9.18.3.39 affected —
9.16.4.19 affected —
9.12.4.58 affected —
9.19.1.12 affected —
9.18.3.46 affected —
9.16.4.27 affected —
9.19.1.18 affected —
9.18.3.53 affected —
9.18.3.55 affected —
9.16.4.38 affected —
9.17.1.33 affected —
9.12.4.62 affected —
9.16.4.39 affected —
9.18.3.56 affected —
9.20.1 affected —
9.16.4.42 affected —
9.19.1.22 affected —
9.18.4 affected —
9.20.1.5 affected —
9.18.4.5 affected —
9.19.1.24 affected —
9.16.4.48 affected —
9.18.4.8 affected —
9.20.2 affected —
9.19.1.27 affected —
9.12.4.65 affected —
9.16.4.55 affected —
9.18.4.22 affected —
9.20.2.10 affected —
9.16.4.57 affected —
9.19.1.28 affected —
9.17.1.39 affected —
9.12.4.67 affected —
9.14.4.24 affected —
9.18.4.24 affected —
9.20.2.21 affected —
9.16.4.61 affected —
9.19.1.31 affected —
9.18.4.29 affected —
9.20.2.22 affected —
9.16.4.62 affected —
9.18.4.34 affected —
9.20.3 affected —
9.16.4.67 affected —
9.16.4.70 affected —
9.18.4.40 affected —
9.23.1 affected —
9.22.1.1 affected —
9.16.4.71 affected —
9.20.3.4 affected —
9.18.4.47 affected —
9.20.3.7 affected —
9.17.1.45 affected —
9.19.1.37 affected —
9.17.1.46 affected —
9.16.4.76 affected —
9.20.3.9 affected —
9.19.1.38 affected —
9.18.4.50 affected —
9.22.1.3 affected —
9.20.3.10 affected —
9.22.1.2 affected —
9.18.4.52 affected —
9.20.3.13 affected —
9.22.1.6 affected —
9.18.4.53 affected —
9.16.4.82 affected —
Cisco Cisco Firepower Threat Defense Software unknown
Version Status Constraints
6.2.3.14 affected —
6.4.0.1 affected —
6.2.3.7 affected —
6.2.3 affected —
6.4.0.2 affected —
6.2.3.9 affected —
6.2.3.1 affected —
6.2.3.2 affected —
6.4.0.5 affected —
6.2.3.10 affected —
6.4.0 affected —
6.4.0.3 affected —
6.2.3.6 affected —
6.4.0.4 affected —
6.2.3.15 affected —
6.2.3.5 affected —
6.2.3.4 affected —
6.2.3.3 affected —
6.2.3.8 affected —
6.4.0.6 affected —
6.2.3.11 affected —
6.2.3.12 affected —
6.2.3.13 affected —
6.4.0.7 affected —
6.4.0.8 affected —
6.6.0 affected —
6.4.0.9 affected —
6.2.3.16 affected —
6.6.0.1 affected —
6.6.1 affected —
6.4.0.10 affected —
6.4.0.11 affected —
6.6.3 affected —
6.6.4 affected —
6.4.0.12 affected —
7.0.0 affected —
6.2.3.17 affected —
7.0.0.1 affected —
6.6.5 affected —
7.0.1 affected —
7.1.0 affected —
6.4.0.13 affected —
6.6.5.1 affected —
6.2.3.18 affected —
7.0.1.1 affected —
6.4.0.14 affected —
7.1.0.1 affected —
6.6.5.2 affected —
7.0.2 affected —
6.4.0.15 affected —
7.2.0 affected —
7.0.2.1 affected —
7.0.3 affected —
6.6.7 affected —
7.1.0.2 affected —
7.2.0.1 affected —
7.0.4 affected —
7.2.1 affected —
7.0.5 affected —
6.4.0.16 affected —
7.3.0 affected —
7.2.2 affected —
7.2.3 affected —
6.6.7.1 affected —
7.3.1 affected —
7.1.0.3 affected —
7.2.4 affected —
7.0.6 affected —
7.2.5 affected —
7.2.4.1 affected —
7.3.1.1 affected —
7.4.0 affected —
6.4.0.17 affected —
7.0.6.1 affected —
7.2.5.1 affected —
7.4.1 affected —
7.2.6 affected —
7.0.6.2 affected —
7.4.1.1 affected —
6.6.7.2 affected —
6.4.0.18 affected —
7.2.7 affected —
7.2.5.2 affected —
7.3.1.2 affected —
7.2.8 affected —
7.6.0 affected —
7.4.2 affected —
7.2.8.1 affected —
7.0.6.3 affected —
7.4.2.1 affected —
7.2.9 affected —
7.0.7 affected —
7.7.0 affected —
7.4.2.2 affected —

No data.

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
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Adaptive Security Appliance Software Subscribe
Firepower Threat Defense Software Subscribe

Project Subscriptions

Vendors Products
Cisco Subscribe
Adaptive Security Appliance Software Subscribe
Firepower Threat Defense Software Subscribe
Advisories
Source ID Title
EUVD EUVD EUVD-2025-24845 A vulnerability in the management and VPN web servers of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability is due to improper validation of user-supplied input on an interface with VPN web services. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on an affected device. A successful exploit could allow the attacker to cause a DoS condition when the device reloads.
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-vpn-dos-mfPekA6e cve-icon cve-icon
History

Fri, 15 Aug 2025 08:15:00 +0000

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

Thu, 14 Aug 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 14 Aug 2025 16:45:00 +0000

Type Values Removed Values Added
Description A vulnerability in the management and VPN web servers of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability is due to improper validation of user-supplied input on an interface with VPN web services. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on an affected device. A successful exploit could allow the attacker to cause a DoS condition when the device reloads.
Title Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2025-08-14T19:19:56.383Z

Reserved: 2024-10-10T19:15:13.238Z

Link: CVE-2025-20243

cve-icon Vulnrichment

Updated: 2025-08-14T18:39:13.260Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-08-14T17:15:38.137

Modified: 2025-08-15T13:12:51.217

Link: CVE-2025-20243

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-08-15T08:07:48Z

Weaknesses