Home › Exploited CVEs › CVE-2020-3580
CVE-2020-3580: Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2022-05-03federal remediation due date
85.58%EPSS exploit probability (30 days) 99.7th percentile
6.1 MEDIUMCVSS 3.1
Knownknown ransomware use
378days from NVD publication to KEV
What it is
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 (CISA)
Apply updates per vendor instructions.
| CWE | CWE-79 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD published | 2020-10-21 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2020-3580.json · all KEV CVEs
Kevscope: daily CISA KEV + EPSS datasetThe whole KEV catalog joined with daily EPSS and CVSS scores as CSV/Parquet, refreshed daily. Free to download.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.