CVE-2026-20070

Published: Mar 4, 2026Modified: Jun 17, 2026

6.1

Vector

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

Exploitability: 2.8 / Impact: 2.7

Source: psirt@cisco.com (Secondary)

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 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.

Affected (236)

Products: Cisco: Adaptive Security Appliance Software, Firepower Threat Defense

Cisco

2 products

Adaptive Security Appliance Software

Firepower Threat Defense

Configuration A

161 vulnerable

Vulnerable Software	Affected Versions
Cisco Adaptive Security Appliance Software	Version 9.12.1.2
Cisco Adaptive Security Appliance Software	Version 9.12.1.3
Cisco Adaptive Security Appliance Software	Version 9.12.1
Cisco Adaptive Security Appliance Software	Version 9.12.2.1
Cisco Adaptive Security Appliance Software	Version 9.12.2.4
Cisco Adaptive Security Appliance Software	Version 9.12.2.5
Cisco Adaptive Security Appliance Software	Version 9.12.2.9
Cisco Adaptive Security Appliance Software	Version 9.12.2
Cisco Adaptive Security Appliance Software	Version 9.12.3.12
Cisco Adaptive Security Appliance Software	Version 9.12.3.2
Cisco Adaptive Security Appliance Software	Version 9.12.3.7
Cisco Adaptive Security Appliance Software	Version 9.12.3.9
Cisco Adaptive Security Appliance Software	Version 9.12.3
Cisco Adaptive Security Appliance Software	Version 9.12.4.10
Cisco Adaptive Security Appliance Software	Version 9.12.4.13
Cisco Adaptive Security Appliance Software	Version 9.12.4.18
Cisco Adaptive Security Appliance Software	Version 9.12.4.24
Cisco Adaptive Security Appliance Software	Version 9.12.4.26
Cisco Adaptive Security Appliance Software	Version 9.12.4.29
Cisco Adaptive Security Appliance Software	Version 9.12.4.2
Cisco Adaptive Security Appliance Software	Version 9.12.4.30
Cisco Adaptive Security Appliance Software	Version 9.12.4.35
Cisco Adaptive Security Appliance Software	Version 9.12.4.37
Cisco Adaptive Security Appliance Software	Version 9.12.4.38
Cisco Adaptive Security Appliance Software	Version 9.12.4.39
Cisco Adaptive Security Appliance Software	Version 9.12.4.40
Cisco Adaptive Security Appliance Software	Version 9.12.4.41
Cisco Adaptive Security Appliance Software	Version 9.12.4.47
Cisco Adaptive Security Appliance Software	Version 9.12.4.48
Cisco Adaptive Security Appliance Software	Version 9.12.4.4
Cisco Adaptive Security Appliance Software	Version 9.12.4.50
Cisco Adaptive Security Appliance Software	Version 9.12.4.52
Cisco Adaptive Security Appliance Software	Version 9.12.4.54
Cisco Adaptive Security Appliance Software	Version 9.12.4.55
Cisco Adaptive Security Appliance Software	Version 9.12.4.56
Cisco Adaptive Security Appliance Software	Version 9.12.4.58
Cisco Adaptive Security Appliance Software	Version 9.12.4.62
Cisco Adaptive Security Appliance Software	Version 9.12.4.65
Cisco Adaptive Security Appliance Software	Version 9.12.4.67
Cisco Adaptive Security Appliance Software	Version 9.12.4.7
Cisco Adaptive Security Appliance Software	Version 9.12.4.8
Cisco Adaptive Security Appliance Software	Version 9.12.4
Cisco Adaptive Security Appliance Software	Version 9.16.1.28
Cisco Adaptive Security Appliance Software	Version 9.16.1
Cisco Adaptive Security Appliance Software	Version 9.16.2.11
Cisco Adaptive Security Appliance Software	Version 9.16.2.13
Cisco Adaptive Security Appliance Software	Version 9.16.2.14
Cisco Adaptive Security Appliance Software	Version 9.16.2.3
Cisco Adaptive Security Appliance Software	Version 9.16.2.7
Cisco Adaptive Security Appliance Software	Version 9.16.2
Cisco Adaptive Security Appliance Software	Version 9.16.3.14
Cisco Adaptive Security Appliance Software	Version 9.16.3.15
Cisco Adaptive Security Appliance Software	Version 9.16.3.19
Cisco Adaptive Security Appliance Software	Version 9.16.3.23
Cisco Adaptive Security Appliance Software	Version 9.16.3.3
Cisco Adaptive Security Appliance Software	Version 9.16.3
Cisco Adaptive Security Appliance Software	Version 9.16.4.14
Cisco Adaptive Security Appliance Software	Version 9.16.4.19
Cisco Adaptive Security Appliance Software	Version 9.16.4.27
Cisco Adaptive Security Appliance Software	Version 9.16.4.38
Cisco Adaptive Security Appliance Software	Version 9.16.4.39
Cisco Adaptive Security Appliance Software	Version 9.16.4.42
Cisco Adaptive Security Appliance Software	Version 9.16.4.48
Cisco Adaptive Security Appliance Software	Version 9.16.4.55
Cisco Adaptive Security Appliance Software	Version 9.16.4.57
Cisco Adaptive Security Appliance Software	Version 9.16.4.61
Cisco Adaptive Security Appliance Software	Version 9.16.4.62
Cisco Adaptive Security Appliance Software	Version 9.16.4.67
Cisco Adaptive Security Appliance Software	Version 9.16.4.70
Cisco Adaptive Security Appliance Software	Version 9.16.4.71
Cisco Adaptive Security Appliance Software	Version 9.16.4.76
Cisco Adaptive Security Appliance Software	Version 9.16.4.82
Cisco Adaptive Security Appliance Software	Version 9.16.4.84
Cisco Adaptive Security Appliance Software	Version 9.16.4.85
Cisco Adaptive Security Appliance Software	Version 9.16.4.9
Cisco Adaptive Security Appliance Software	Version 9.16.4
Cisco Adaptive Security Appliance Software	Version 9.17.1.10
Cisco Adaptive Security Appliance Software	Version 9.17.1.11
Cisco Adaptive Security Appliance Software	Version 9.17.1.13
Cisco Adaptive Security Appliance Software	Version 9.17.1.15
Cisco Adaptive Security Appliance Software	Version 9.17.1.20
Cisco Adaptive Security Appliance Software	Version 9.17.1.30
Cisco Adaptive Security Appliance Software	Version 9.17.1.33
Cisco Adaptive Security Appliance Software	Version 9.17.1.39
Cisco Adaptive Security Appliance Software	Version 9.17.1.45
Cisco Adaptive Security Appliance Software	Version 9.17.1.46
Cisco Adaptive Security Appliance Software	Version 9.17.1.7
Cisco Adaptive Security Appliance Software	Version 9.17.1.9
Cisco Adaptive Security Appliance Software	Version 9.17.1
Cisco Adaptive Security Appliance Software	Version 9.18.1.3
Cisco Adaptive Security Appliance Software	Version 9.18.1
Cisco Adaptive Security Appliance Software	Version 9.18.2.5
Cisco Adaptive Security Appliance Software	Version 9.18.2.7
Cisco Adaptive Security Appliance Software	Version 9.18.2.8
Cisco Adaptive Security Appliance Software	Version 9.18.2
Cisco Adaptive Security Appliance Software	Version 9.18.3.39
Cisco Adaptive Security Appliance Software	Version 9.18.3.46
Cisco Adaptive Security Appliance Software	Version 9.18.3.53
Cisco Adaptive Security Appliance Software	Version 9.18.3.55
Cisco Adaptive Security Appliance Software	Version 9.18.3.56
Cisco Adaptive Security Appliance Software	Version 9.18.3
Cisco Adaptive Security Appliance Software	Version 9.18.4.22
Cisco Adaptive Security Appliance Software	Version 9.18.4.24
Cisco Adaptive Security Appliance Software	Version 9.18.4.29
Cisco Adaptive Security Appliance Software	Version 9.18.4.34
Cisco Adaptive Security Appliance Software	Version 9.18.4.40
Cisco Adaptive Security Appliance Software	Version 9.18.4.47
Cisco Adaptive Security Appliance Software	Version 9.18.4.50
Cisco Adaptive Security Appliance Software	Version 9.18.4.52
Cisco Adaptive Security Appliance Software	Version 9.18.4.53
Cisco Adaptive Security Appliance Software	Version 9.18.4.57
Cisco Adaptive Security Appliance Software	Version 9.18.4.5
Cisco Adaptive Security Appliance Software	Version 9.18.4.66
Cisco Adaptive Security Appliance Software	Version 9.18.4.67
Cisco Adaptive Security Appliance Software	Version 9.18.4.68
Cisco Adaptive Security Appliance Software	Version 9.18.4.8
Cisco Adaptive Security Appliance Software	Version 9.18.4
Cisco Adaptive Security Appliance Software	Version 9.19.1.12
Cisco Adaptive Security Appliance Software	Version 9.19.1.18
Cisco Adaptive Security Appliance Software	Version 9.19.1.22
Cisco Adaptive Security Appliance Software	Version 9.19.1.24
Cisco Adaptive Security Appliance Software	Version 9.19.1.27
Cisco Adaptive Security Appliance Software	Version 9.19.1.28
Cisco Adaptive Security Appliance Software	Version 9.19.1.31
Cisco Adaptive Security Appliance Software	Version 9.19.1.37
Cisco Adaptive Security Appliance Software	Version 9.19.1.38
Cisco Adaptive Security Appliance Software	Version 9.19.1.42
Cisco Adaptive Security Appliance Software	Version 9.19.1.5
Cisco Adaptive Security Appliance Software	Version 9.19.1.9
Cisco Adaptive Security Appliance Software	Version 9.19.1
Cisco Adaptive Security Appliance Software	Version 9.20.1.5
Cisco Adaptive Security Appliance Software	Version 9.20.1
Cisco Adaptive Security Appliance Software	Version 9.20.2.10
Cisco Adaptive Security Appliance Software	Version 9.20.2.21
Cisco Adaptive Security Appliance Software	Version 9.20.2.22
Cisco Adaptive Security Appliance Software	Version 9.20.2
Cisco Adaptive Security Appliance Software	Version 9.20.3.10
Cisco Adaptive Security Appliance Software	Version 9.20.3.13
Cisco Adaptive Security Appliance Software	Version 9.20.3.16
Cisco Adaptive Security Appliance Software	Version 9.20.3.20
Cisco Adaptive Security Appliance Software	Version 9.20.3.4
Cisco Adaptive Security Appliance Software	Version 9.20.3.7
Cisco Adaptive Security Appliance Software	Version 9.20.3.9
Cisco Adaptive Security Appliance Software	Version 9.20.3
Cisco Adaptive Security Appliance Software	Version 9.20.4.10
Cisco Adaptive Security Appliance Software	Version 9.20.4.7
Cisco Adaptive Security Appliance Software	Version 9.20.4
Cisco Adaptive Security Appliance Software	Version 9.22.1.1
Cisco Adaptive Security Appliance Software	Version 9.22.1.2
Cisco Adaptive Security Appliance Software	Version 9.22.1.3
Cisco Adaptive Security Appliance Software	Version 9.22.1.6
Cisco Adaptive Security Appliance Software	Version 9.22.2.13
Cisco Adaptive Security Appliance Software	Version 9.22.2.14
Cisco Adaptive Security Appliance Software	Version 9.22.2.4
Cisco Adaptive Security Appliance Software	Version 9.22.2.9
Cisco Adaptive Security Appliance Software	Version 9.22.2
Cisco Adaptive Security Appliance Software	Version 9.23.1.13
Cisco Adaptive Security Appliance Software	Version 9.23.1.19
Cisco Adaptive Security Appliance Software	Version 9.23.1.3
Cisco Adaptive Security Appliance Software	Version 9.23.1.7
Cisco Adaptive Security Appliance Software	Version 9.23.1

Configuration B

75 vulnerable

Vulnerable Software	Affected Versions
Cisco Firepower Threat Defense	Version 6.4.0.10
Cisco Firepower Threat Defense	Version 6.4.0.11
Cisco Firepower Threat Defense	Version 6.4.0.12
Cisco Firepower Threat Defense	Version 6.4.0.13
Cisco Firepower Threat Defense	Version 6.4.0.14
Cisco Firepower Threat Defense	Version 6.4.0.15
Cisco Firepower Threat Defense	Version 6.4.0.16
Cisco Firepower Threat Defense	Version 6.4.0.17
Cisco Firepower Threat Defense	Version 6.4.0.18
Cisco Firepower Threat Defense	Version 6.4.0.1
Cisco Firepower Threat Defense	Version 6.4.0.2
Cisco Firepower Threat Defense	Version 6.4.0.3
Cisco Firepower Threat Defense	Version 6.4.0.4
Cisco Firepower Threat Defense	Version 6.4.0.5
Cisco Firepower Threat Defense	Version 6.4.0.6
Cisco Firepower Threat Defense	Version 6.4.0.7
Cisco Firepower Threat Defense	Version 6.4.0.8
Cisco Firepower Threat Defense	Version 6.4.0.9
Cisco Firepower Threat Defense	Version 6.4.0
Cisco Firepower Threat Defense	Version 7.0.0.1
Cisco Firepower Threat Defense	Version 7.0.0
Cisco Firepower Threat Defense	Version 7.0.1.1
Cisco Firepower Threat Defense	Version 7.0.1
Cisco Firepower Threat Defense	Version 7.0.2.1
Cisco Firepower Threat Defense	Version 7.0.2
Cisco Firepower Threat Defense	Version 7.0.3
Cisco Firepower Threat Defense	Version 7.0.4
Cisco Firepower Threat Defense	Version 7.0.5
Cisco Firepower Threat Defense	Version 7.0.6.1
Cisco Firepower Threat Defense	Version 7.0.6.2
Cisco Firepower Threat Defense	Version 7.0.6.3
Cisco Firepower Threat Defense	Version 7.0.6
Cisco Firepower Threat Defense	Version 7.0.7
Cisco Firepower Threat Defense	Version 7.0.8.1
Cisco Firepower Threat Defense	Version 7.0.8
Cisco Firepower Threat Defense	Version 7.1.0.1
Cisco Firepower Threat Defense	Version 7.1.0.2
Cisco Firepower Threat Defense	Version 7.1.0.3
Cisco Firepower Threat Defense	Version 7.1.0
Cisco Firepower Threat Defense	Version 7.2.0.1
Cisco Firepower Threat Defense	Version 7.2.0
Cisco Firepower Threat Defense	Version 7.2.10.2
Cisco Firepower Threat Defense	Version 7.2.10
Cisco Firepower Threat Defense	Version 7.2.1
Cisco Firepower Threat Defense	Version 7.2.2
Cisco Firepower Threat Defense	Version 7.2.3
Cisco Firepower Threat Defense	Version 7.2.4.1
Cisco Firepower Threat Defense	Version 7.2.4
Cisco Firepower Threat Defense	Version 7.2.5.1
Cisco Firepower Threat Defense	Version 7.2.5.2
Cisco Firepower Threat Defense	Version 7.2.5
Cisco Firepower Threat Defense	Version 7.2.6
Cisco Firepower Threat Defense	Version 7.2.7
Cisco Firepower Threat Defense	Version 7.2.8.1
Cisco Firepower Threat Defense	Version 7.2.8
Cisco Firepower Threat Defense	Version 7.2.9
Cisco Firepower Threat Defense	Version 7.3.0
Cisco Firepower Threat Defense	Version 7.3.1.1
Cisco Firepower Threat Defense	Version 7.3.1.2
Cisco Firepower Threat Defense	Version 7.3.1
Cisco Firepower Threat Defense	Version 7.4.0
Cisco Firepower Threat Defense	Version 7.4.1.1
Cisco Firepower Threat Defense	Version 7.4.1
Cisco Firepower Threat Defense	Version 7.4.2.1
Cisco Firepower Threat Defense	Version 7.4.2.2
Cisco Firepower Threat Defense	Version 7.4.2.3
Cisco Firepower Threat Defense	Version 7.4.2.4
Cisco Firepower Threat Defense	Version 7.4.2
Cisco Firepower Threat Defense	Version 7.6.0
Cisco Firepower Threat Defense	Version 7.6.1
Cisco Firepower Threat Defense	Version 7.6.2.1
Cisco Firepower Threat Defense	Version 7.6.2
Cisco Firepower Threat Defense	Version 7.7.0
Cisco Firepower Threat Defense	Version 7.7.10.1
Cisco Firepower Threat Defense	Version 7.7.10

Related CWEs

CWE-80

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

References (1)

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-xss-uwjc4HR

Source: psirt@cisco.com

Vendor Advisory

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