Improper HTTP Request Validation in Cisco Secure Firewall Products
CVE-2026-20069

4.3MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco Secure Firewall Adaptive Security Appliance (asa) Software
Cisco Secure Firewall Threat Defense (ftd) Software
Vendor
CVE Published:
4 March 2026

Badges

👾 Exploit Exists

What is CVE-2026-20069?

A security flaw exists in the VPN web services component of Cisco Secure Firewall ASA and FTD Software due to inadequate validation of HTTP requests. This vulnerability could enable an unauthenticated remote attacker to carry out browser-based malicious activities by tricking users into visiting a specially designed malicious site that transmits harmful HTTP requests to affected devices. Such exploitation could facilitate cross-site scripting (XSS) attacks by allowing the attacker to manipulate the valid responses from the device to influence user browsers without directly impacting the device itself.

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Affected Version(s)

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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