A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device.

This vulnerability is due to improper validation of HTTP requests. An attacker could exploit this vulnerability by persuading a user to visit a website that is designed to pass malicious HTTP requests to a device that is running Cisco Secure Firewall ASA Software or Cisco Secure FTD Software and has web services endpoints supporting VPN features enabled. A successful exploit could allow the attacker to reflect malicious input from the affected device to the browser that is in use and conduct browser-based attacks, including cross-site scripting (XSS) attacks. The attacker is not able to directly impact the affected device.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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 Secure Firewall Adaptive Security Appliance (ASA) Software unknown
Version Status Constraints
9.12.3 affected —
9.12.1 affected —
9.12.2 affected —
9.12.4 affected —
9.12.3.2 affected —
9.12.3.7 affected —
9.12.2.5 affected —
9.12.3.12 affected —
9.12.1.3 affected —
9.12.2.4 affected —
9.12.1.2 affected —
9.12.2.9 affected —
9.12.3.9 affected —
9.12.2.1 affected —
9.12.4.2 affected —
9.12.4.4 affected —
9.12.4.7 affected —
9.12.4.8 affected —
9.12.4.10 affected —
9.12.4.13 affected —
9.12.4.18 affected —
9.12.4.24 affected —
9.16.1 affected —
9.12.4.26 affected —
9.16.1.28 affected —
9.12.4.29 affected —
9.16.2 affected —
9.12.4.30 affected —
9.16.2.3 affected —
9.12.4.35 affected —
9.16.2.7 affected —
9.12.4.37 affected —
9.17.1 affected —
9.16.2.11 affected —
9.16.2.13 affected —
9.12.4.39 affected —
9.12.4.38 affected —
9.16.2.14 affected —
9.17.1.7 affected —
9.12.4.40 affected —
9.16.3.3 affected —
9.16.3 affected —
9.16.3.14 affected —
9.17.1.9 affected —
9.12.4.41 affected —
9.17.1.10 affected —
9.18.1 affected —
9.12.4.47 affected —
9.16.3.15 affected —
9.18.1.3 affected —
9.17.1.11 affected —
9.12.4.48 affected —
9.18.2 affected —
9.16.3.19 affected —
9.17.1.13 affected —
9.12.4.50 affected —
9.17.1.15 affected —
9.12.4.52 affected —
9.16.3.23 affected —
9.18.2.5 affected —
9.16.4 affected —
9.12.4.54 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 —
9.16.4.14 affected —
9.18.3 affected —
9.19.1.5 affected —
9.12.4.56 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 —
9.18.4.24 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 —
9.22.2 affected —
9.20.3.16 affected —
9.19.1.42 affected —
9.18.4.57 affected —
9.16.4.84 affected —
9.23.1.3 affected —
9.20.3.20 affected —
9.22.2.4 affected —
9.23.1.7 affected —
9.20.4 affected —
9.22.2.9 affected —
Cisco Cisco Secure Firewall Threat Defense (FTD) Software unknown
Version Status Constraints
6.4.0.1 affected —
6.4.0.2 affected —
6.4.0.5 affected —
6.4.0 affected —
6.4.0.3 affected —
6.4.0.4 affected —
6.4.0.6 affected —
6.4.0.7 affected —
6.4.0.8 affected —
6.4.0.9 affected —
6.4.0.10 affected —
6.4.0.11 affected —
6.4.0.12 affected —
7.0.0 affected —
7.0.0.1 affected —
7.0.1 affected —
7.1.0 affected —
6.4.0.13 affected —
7.0.1.1 affected —
6.4.0.14 affected —
7.1.0.1 affected —
7.0.2 affected —
6.4.0.15 affected —
7.2.0 affected —
7.0.2.1 affected —
7.0.3 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 —
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 —
6.4.0.18 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 —
7.2.10 affected —
7.6.1 affected —
7.4.2.3 affected —
7.0.8 affected —
7.6.2 affected —
7.7.10 affected —
7.0.8.1 affected —
7.6.2.1 affected —
7.7.10.1 affected —
7.4.2.4 affected —
7.2.10.2 affected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

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-desync-n5AVzEQw cve-icon cve-icon
History

Wed, 04 Mar 2026 18:00:00 +0000

Type Values Removed Values Added
Description A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device. This vulnerability is due to improper validation of HTTP requests. An attacker could exploit this vulnerability by persuading a user to visit a website that is designed to pass malicious HTTP requests to a device that is running Cisco Secure Firewall ASA Software or Cisco Secure FTD Software and has web services endpoints supporting VPN features enabled. A successful exploit could allow the attacker to reflect malicious input from the affected device to the browser that is in use and conduct browser-based attacks, including cross-site scripting (XSS) attacks. The attacker is not able to directly impact the affected device.
Title Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Client-Side Request Smuggling Vulnerability
Weaknesses CWE-444
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-03-04T17:51:01.338Z

Reserved: 2025-10-08T11:59:15.357Z

Link: CVE-2026-20069

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-04T18:16:22.717

Modified: 2026-03-04T18:16:22.717

Link: CVE-2026-20069

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses