CVE-2026-20069

Name: CVE-2026-20069
Creator: NVD / NIST
Published: 2026-03-04T18:16:22.717+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2026-20069 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

0.27%

19.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Cisco	Firepower Threat Defense Software	>= 6.4.0, < 7.0.9
Cisco	Firepower Threat Defense Software	>= 7.1.0, < 7.2.11
Cisco	Firepower Threat Defense Software	>= 7.3.0, < 7.4.3
Cisco	Firepower Threat Defense Software	>= 7.6.0, < 7.6.4
Cisco	Firepower Threat Defense Software	>= 7.7.0, < 7.7.11
Cisco	Adaptive Security Appliance Software	>= 9.12.1, < 9.16.4.85
Cisco	Adaptive Security Appliance Software	>= 9.17.1, < 9.18.4.66
Cisco	Adaptive Security Appliance Software	>= 9.19.1, < 9.20.4
Cisco	Adaptive Security Appliance Software	>= 9.22.1.1, < 9.22.2.4
Cisco	Adaptive Security Appliance Software	>= 9.23.1, < 9.23.1.7

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-desync-n5AVzEQwVendor Advisory

Timeline

Published: Mar 4, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20069?

How severe is CVE-2026-20069?

CVE-2026-20069 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20069?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20069?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST