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CVE-2020-3580

CISA KEV

Published November 3, 2021 · Updated April 3, 2026

high
Official Description+

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an insufficient input validation vulnerability for user-supplied input by the web services interface. Successful exploitation could allow an attacker to perform cross-site scripting (XSS) in the context of the interface or access sensitive browser-based information.

Affected Products

VendorProduct
CiscoAdaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

Patch Status

Patch by 2022-05-03

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2020-3580.