Riskcovery

CVE-2026-20069

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Client-Side Request Smuggling Vulnerability

State
Published
Severity
4.3 Medium
Published
Mar 4, 2026
Updated
Mar 4, 2026
Reserved
Oct 8, 2025

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.14.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:Ncisco

Weaknesses

  • CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Affected Products

ProductVersions
Cisco Secure Firewall Adaptive Security Appliance (ASA) SoftwareCisco
  • 9.12.3Affected
  • 9.12.1Affected
  • 9.12.2Affected
  • 9.12.4Affected
  • 9.12.3.2Affected
  • 9.12.3.7Affected
  • 9.12.2.5Affected
  • 9.12.3.12Affected
  • 9.12.1.3Affected
  • 9.12.2.4Affected
  • 9.12.1.2Affected
  • 9.12.2.9Affected
  • 9.12.3.9Affected
  • 9.12.2.1Affected
  • 9.12.4.2Affected
  • 9.12.4.4Affected
  • 9.12.4.7Affected
  • 9.12.4.8Affected
  • 9.12.4.10Affected
  • 9.12.4.13Affected
  • 9.12.4.18Affected
  • 9.12.4.24Affected
  • 9.16.1Affected
  • 9.12.4.26Affected
  • 9.16.1.28Affected
  • and 126 more versions
Cisco Secure Firewall Threat Defense (FTD) SoftwareCisco
  • 6.4.0.1Affected
  • 6.4.0.2Affected
  • 6.4.0.5Affected
  • 6.4.0Affected
  • 6.4.0.3Affected
  • 6.4.0.4Affected
  • 6.4.0.6Affected
  • 6.4.0.7Affected
  • 6.4.0.8Affected
  • 6.4.0.9Affected
  • 6.4.0.10Affected
  • 6.4.0.11Affected
  • 6.4.0.12Affected
  • 7.0.0Affected
  • 7.0.0.1Affected
  • 7.0.1Affected
  • 7.1.0Affected
  • 6.4.0.13Affected
  • 7.0.1.1Affected
  • 6.4.0.14Affected
  • 7.1.0.1Affected
  • 7.0.2Affected
  • 6.4.0.15Affected
  • 7.2.0Affected
  • 7.0.2.1Affected
  • and 50 more versions

References

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