Vulnerability Monitor

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CVE-2026-20070

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 a cross-site scripting (XSS) attack against a browser that is accessing an affected device.  This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by persuading a user to follow a link to a malicious website that is designed to submit malicious input to the affected application. A successful exploit could allow the attacker to execute arbitrary HTML or script code in the browser in the context of the VPN web server.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.1, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, limited integrity, for affected systems. Impacting 2 products from cisco, from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2026-03-04T18:16:23.170

Last Modified

2026-05-04T17:24:04.880

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.1 (MEDIUM)

Weaknesses
  • Type: Primary
    CWE-80
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco adaptive_security_appliance_software 9.12.1 Yes
Operating System cisco adaptive_security_appliance_software 9.12.1.2 Yes
Operating System cisco adaptive_security_appliance_software 9.12.1.3 Yes
Operating System cisco adaptive_security_appliance_software 9.12.2 Yes
Operating System cisco adaptive_security_appliance_software 9.12.2.1 Yes
Operating System cisco adaptive_security_appliance_software 9.12.2.4 Yes
Operating System cisco adaptive_security_appliance_software 9.12.2.5 Yes
Operating System cisco adaptive_security_appliance_software 9.12.2.9 Yes
Operating System cisco adaptive_security_appliance_software 9.12.3 Yes
Operating System cisco adaptive_security_appliance_software 9.12.3.2 Yes
Operating System cisco adaptive_security_appliance_software 9.12.3.7 Yes
Operating System cisco adaptive_security_appliance_software 9.12.3.9 Yes
Operating System cisco adaptive_security_appliance_software 9.12.3.12 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.2 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.4 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.7 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.8 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.10 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.13 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.18 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.24 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.26 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.29 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.30 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.35 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.37 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.38 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.39 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.40 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.41 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.47 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.48 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.50 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.52 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.54 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.55 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.56 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.58 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.62 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.65 Yes
Operating System cisco adaptive_security_appliance_software 9.12.4.67 Yes
Operating System cisco adaptive_security_appliance_software 9.16.1 Yes
Operating System cisco adaptive_security_appliance_software 9.16.1.28 Yes
Operating System cisco adaptive_security_appliance_software 9.16.2 Yes
Operating System cisco adaptive_security_appliance_software 9.16.2.3 Yes
Operating System cisco adaptive_security_appliance_software 9.16.2.7 Yes
Operating System cisco adaptive_security_appliance_software 9.16.2.11 Yes
Operating System cisco adaptive_security_appliance_software 9.16.2.13 Yes
Operating System cisco adaptive_security_appliance_software 9.16.2.14 Yes
Operating System cisco adaptive_security_appliance_software 9.16.3 Yes
Operating System cisco adaptive_security_appliance_software 9.16.3.3 Yes
Operating System cisco adaptive_security_appliance_software 9.16.3.14 Yes
Operating System cisco adaptive_security_appliance_software 9.16.3.15 Yes
Operating System cisco adaptive_security_appliance_software 9.16.3.19 Yes
Operating System cisco adaptive_security_appliance_software 9.16.3.23 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.9 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.14 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.19 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.27 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.38 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.39 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.42 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.48 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.55 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.57 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.61 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.62 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.67 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.70 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.71 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.76 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.82 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.84 Yes
Operating System cisco adaptive_security_appliance_software 9.16.4.85 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.7 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.9 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.10 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.11 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.13 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.15 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.20 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.30 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.33 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.39 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.45 Yes
Operating System cisco adaptive_security_appliance_software 9.17.1.46 Yes
Operating System cisco adaptive_security_appliance_software 9.18.1 Yes
Operating System cisco adaptive_security_appliance_software 9.18.1.3 Yes
Operating System cisco adaptive_security_appliance_software 9.18.2 Yes
Operating System cisco adaptive_security_appliance_software 9.18.2.5 Yes
Operating System cisco adaptive_security_appliance_software 9.18.2.7 Yes
Operating System cisco adaptive_security_appliance_software 9.18.2.8 Yes
Operating System cisco adaptive_security_appliance_software 9.18.3 Yes
Operating System cisco adaptive_security_appliance_software 9.18.3.39 Yes
Operating System cisco adaptive_security_appliance_software 9.18.3.46 Yes
Operating System cisco adaptive_security_appliance_software 9.18.3.53 Yes
Operating System cisco adaptive_security_appliance_software 9.18.3.55 Yes
Operating System cisco adaptive_security_appliance_software 9.18.3.56 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.5 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.8 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.22 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.24 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.29 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.34 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.40 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.47 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.50 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.52 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.53 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.57 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.66 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.67 Yes
Operating System cisco adaptive_security_appliance_software 9.18.4.68 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.5 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.9 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.12 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.18 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.22 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.24 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.27 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.28 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.31 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.37 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.38 Yes
Operating System cisco adaptive_security_appliance_software 9.19.1.42 Yes
Operating System cisco adaptive_security_appliance_software 9.20.1 Yes
Operating System cisco adaptive_security_appliance_software 9.20.1.5 Yes
Operating System cisco adaptive_security_appliance_software 9.20.2 Yes
Operating System cisco adaptive_security_appliance_software 9.20.2.10 Yes
Operating System cisco adaptive_security_appliance_software 9.20.2.21 Yes
Operating System cisco adaptive_security_appliance_software 9.20.2.22 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3.4 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3.7 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3.9 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3.10 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3.13 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3.16 Yes
Operating System cisco adaptive_security_appliance_software 9.20.3.20 Yes
Operating System cisco adaptive_security_appliance_software 9.20.4 Yes
Operating System cisco adaptive_security_appliance_software 9.20.4.7 Yes
Operating System cisco adaptive_security_appliance_software 9.20.4.10 Yes
Operating System cisco adaptive_security_appliance_software 9.22.1.1 Yes
Operating System cisco adaptive_security_appliance_software 9.22.1.2 Yes
Operating System cisco adaptive_security_appliance_software 9.22.1.3 Yes
Operating System cisco adaptive_security_appliance_software 9.22.1.6 Yes
Operating System cisco adaptive_security_appliance_software 9.22.2 Yes
Operating System cisco adaptive_security_appliance_software 9.22.2.4 Yes
Operating System cisco adaptive_security_appliance_software 9.22.2.9 Yes
Operating System cisco adaptive_security_appliance_software 9.22.2.13 Yes
Operating System cisco adaptive_security_appliance_software 9.22.2.14 Yes
Operating System cisco adaptive_security_appliance_software 9.23.1 Yes
Operating System cisco adaptive_security_appliance_software 9.23.1.3 Yes
Operating System cisco adaptive_security_appliance_software 9.23.1.7 Yes
Operating System cisco adaptive_security_appliance_software 9.23.1.13 Yes
Operating System cisco adaptive_security_appliance_software 9.23.1.19 Yes
Application cisco firepower_threat_defense 6.4.0 Yes
Application cisco firepower_threat_defense 6.4.0.1 Yes
Application cisco firepower_threat_defense 6.4.0.2 Yes
Application cisco firepower_threat_defense 6.4.0.3 Yes
Application cisco firepower_threat_defense 6.4.0.4 Yes
Application cisco firepower_threat_defense 6.4.0.5 Yes
Application cisco firepower_threat_defense 6.4.0.6 Yes
Application cisco firepower_threat_defense 6.4.0.7 Yes
Application cisco firepower_threat_defense 6.4.0.8 Yes
Application cisco firepower_threat_defense 6.4.0.9 Yes
Application cisco firepower_threat_defense 6.4.0.10 Yes
Application cisco firepower_threat_defense 6.4.0.11 Yes
Application cisco firepower_threat_defense 6.4.0.12 Yes
Application cisco firepower_threat_defense 6.4.0.13 Yes
Application cisco firepower_threat_defense 6.4.0.14 Yes
Application cisco firepower_threat_defense 6.4.0.15 Yes
Application cisco firepower_threat_defense 6.4.0.16 Yes
Application cisco firepower_threat_defense 6.4.0.17 Yes
Application cisco firepower_threat_defense 6.4.0.18 Yes
Application cisco firepower_threat_defense 7.0.0 Yes
Application cisco firepower_threat_defense 7.0.0.1 Yes
Application cisco firepower_threat_defense 7.0.1 Yes
Application cisco firepower_threat_defense 7.0.1.1 Yes
Application cisco firepower_threat_defense 7.0.2 Yes
Application cisco firepower_threat_defense 7.0.2.1 Yes
Application cisco firepower_threat_defense 7.0.3 Yes
Application cisco firepower_threat_defense 7.0.4 Yes
Application cisco firepower_threat_defense 7.0.5 Yes
Application cisco firepower_threat_defense 7.0.6 Yes
Application cisco firepower_threat_defense 7.0.6.1 Yes
Application cisco firepower_threat_defense 7.0.6.2 Yes
Application cisco firepower_threat_defense 7.0.6.3 Yes
Application cisco firepower_threat_defense 7.0.7 Yes
Application cisco firepower_threat_defense 7.0.8 Yes
Application cisco firepower_threat_defense 7.0.8.1 Yes
Application cisco firepower_threat_defense 7.1.0 Yes
Application cisco firepower_threat_defense 7.1.0.1 Yes
Application cisco firepower_threat_defense 7.1.0.2 Yes
Application cisco firepower_threat_defense 7.1.0.3 Yes
Application cisco firepower_threat_defense 7.2.0 Yes
Application cisco firepower_threat_defense 7.2.0.1 Yes
Application cisco firepower_threat_defense 7.2.1 Yes
Application cisco firepower_threat_defense 7.2.2 Yes
Application cisco firepower_threat_defense 7.2.3 Yes
Application cisco firepower_threat_defense 7.2.4 Yes
Application cisco firepower_threat_defense 7.2.4.1 Yes
Application cisco firepower_threat_defense 7.2.5 Yes
Application cisco firepower_threat_defense 7.2.5.1 Yes
Application cisco firepower_threat_defense 7.2.5.2 Yes
Application cisco firepower_threat_defense 7.2.6 Yes
Application cisco firepower_threat_defense 7.2.7 Yes
Application cisco firepower_threat_defense 7.2.8 Yes
Application cisco firepower_threat_defense 7.2.8.1 Yes
Application cisco firepower_threat_defense 7.2.9 Yes
Application cisco firepower_threat_defense 7.2.10 Yes
Application cisco firepower_threat_defense 7.2.10.2 Yes
Application cisco firepower_threat_defense 7.3.0 Yes
Application cisco firepower_threat_defense 7.3.1 Yes
Application cisco firepower_threat_defense 7.3.1.1 Yes
Application cisco firepower_threat_defense 7.3.1.2 Yes
Application cisco firepower_threat_defense 7.4.0 Yes
Application cisco firepower_threat_defense 7.4.1 Yes
Application cisco firepower_threat_defense 7.4.1.1 Yes
Application cisco firepower_threat_defense 7.4.2 Yes
Application cisco firepower_threat_defense 7.4.2.1 Yes
Application cisco firepower_threat_defense 7.4.2.2 Yes
Application cisco firepower_threat_defense 7.4.2.3 Yes
Application cisco firepower_threat_defense 7.4.2.4 Yes
Application cisco firepower_threat_defense 7.6.0 Yes
Application cisco firepower_threat_defense 7.6.1 Yes
Application cisco firepower_threat_defense 7.6.2 Yes
Application cisco firepower_threat_defense 7.6.2.1 Yes
Application cisco firepower_threat_defense 7.7.0 Yes
Application cisco firepower_threat_defense 7.7.10 Yes
Application cisco firepower_threat_defense 7.7.10.1 Yes
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.