CVE-2026-20070mediumCWE-80

CVE-2026-20070: medium-severity vulnerability in Cisco Secure Firewall Adaptive Security…

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

Published

Follow this CVE+ Monitor Cisco Secure Firewall Threat Defense+ Monitor Cisco Secure Firewall Adaptive Security Appliance

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.1epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
Cisco · Cisco Secure Firewall Adaptive Security Appliance (ASA) SoftwareCisco · Cisco Secure Firewall Threat Defense (FTD) Software
Related CVEs — Cisco Secure Firewall Adaptive Security…

In the same product, most dangerous first.

CVE-2025-20362MEDIUMCVE-2025-20362EPSS 87.1%KEVCVE-2025-20333CRITICALCVE-2025-20333EPSS 71.2%KEVCVE-2026-20349HIGHCisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service VulnerabilityEPSS 1.0%KEVCVE-2026-76418HIGHCisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Tunnel Denial of Service VulnerabilityEPSS 0.8%KEVCVE-2026-20099MEDIUMCisco UCS Manager and FXOS Software Command Injection VulnerabilityEPSS 0.7%CVE-2024-20358MEDIUMCVE-2024-20358EPSS 0.7%