CVE-2020-3599: Cisco Adaptive Security Appliance

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information.

Affected products

• Cisco Adaptive Security Appliance: before 9.6.4.45 (fixed in 9.6.4.45)
• Cisco Adaptive Security Appliance Software: from 9.7.0, before 9.8.4.29 (fixed in 9.8.4.29); from 9.9.0, before 9.9.2.80 (fixed in 9.9.2.80); from 9.10.0, before 9.10.1.43 (fixed in 9.10.1.43); from 9.12.0, before 9.12.4.4 (fixed in 9.12.4.4); from 9.13.0, before 9.13.1.13 (fixed in 9.13.1.13); from 9.14.0, before 9.14.1.29 (fixed in 9.14.1.29)

Published 2020-10-21. Last modified 2026-06-17.