November 3, 2021 · Applied Cybernetics Group
CVE-2020-3580 — Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
known ransomware use
Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Cisco
- Product
- Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
- EPSS
- 99.8th percentile (score 0.933, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-3580
CISA short 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.
Required action
Apply updates per vendor instructions.