CVE-2020-3580

MEDIUM6.1

CISA KEV

Published 2020-10-21 · Updated 2026-08-11 · Source psirt@cisco.com

Summary

CVE-2020-3580 is a medium-severity (CVSS 6.1) vulnerability in Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD). CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Cisco has 101 vulnerabilities in the KEV catalog, 7 of them linked to ransomware.

All 101 known-exploited Cisco vulnerabilities →

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.

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

CWE-79CWE-79

CISA Known-Exploited Vulnerability

Product: Cisco — Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

Name: Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability

Date added: 2021-11-03 · Due: 2022-05-03

USED IN RANSOMWARE

Required action: Apply updates per vendor instructions.

References

View on NVD

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