PT-2026-23027 · Cisco · Cisco Secure Firewall Asa+1

Josh Weber · Published 2026-03-04 · Updated 2026-03-04 · CVE-2026-20069

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software (affected versions not specified)

Description A flaw exists in the VPN web services component that may allow a remote attacker to carry out browser-based attacks against users of an affected device. This is caused by inadequate validation of HTTP requests. An attacker could exploit this by convincing a user to visit a malicious website designed to send harmful HTTP requests to a device running the software with VPN web services enabled. A successful exploit could allow the attacker to reflect malicious input to the user's browser, potentially leading to attacks like cross-site scripting (XSS). The attacker cannot directly impact the affected device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2026-20069

Affected Products

Cisco Secure Firewall Asa

Cisco Secure Firewall Threat Defense

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-20069 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-desync-n5AVzEQw · Vendor Advisory
• https://twitter.com/CVEnew/status/2029272783927099676 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2029297961570533433 · Twitter Post