Skip to content
fr Sign in
6.1 Medium Exploited · ransomware

CVE-2020-3580 Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability

Active exploitation observed

· CISA KEV catalogue
Required action Apply updates per vendor instructions.
Ransomware campaigns Known to be used
Weakness CWE-79

Description

Multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the web services interface of an affected device. The vulnerabilities are due to insufficient validation of user-supplied input by the web services interface of an affected device. An attacker could exploit these vulnerabilities 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 allow the attacker to access sensitive, browser-based information. Note: These vulnerabilities affect only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.

Affected products and versions

Product Affected versions Fixed in
Cisco Adaptive Security Appliance (ASA) Software Versions not published

References

Timeline

  1. Published
  2. Added to the KEV catalogue
  3. Last modified

Other CVEs of Cisco Adaptive Security Appliance (ASA) Software

The 161 CVEs of Cisco Adaptive Security Appliance (ASA) Software →
CVE-2025-20363 A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure… 9.0 Critical CVE-2025-20254 A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco Secure Firewall Adaptive Security… 5.8 Medium CVE-2025-20263 A vulnerability in the web services interface of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and… 8.6 High CVE-2025-20253 A vulnerability in the IKEv2 feature of Cisco IOS Software, IOS XE Software, Secure Firewall ASA Software, and Secure… 8.6 High
Track this CVE