🔐 CVE Alert

CVE-2026-20070

MEDIUM 6.1

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Cross-Site Scripting Vulnerability

CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th

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.

CWE CWE-80
Vendor cisco
Product cisco secure firewall adaptive security appliance (asa) software
Ecosystems
Industries
NetworkingTelecommunications
Published Mar 4, 2026
Last Updated Mar 4, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Affected Versions

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

References

NVD ↗ CVE.org ↗ EPSS Data ↗
sec.cloudapps.cisco.com: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-xss-uwjc4HR