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VulnerabilityKnown exploited · ransomwareExploit likelihood 86%
Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability
CVE-2020-3580 · CISA KEV · November 3, 2021
Summary
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.
From CISA, quoted as published. Check the source before acting.
What to do
Apply updates per vendor instructions.
CISA required action, quoted.
Affected products
| Vendor | Product |
|---|---|
| Cisco | Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) |
Why it's on these mode pages
- Maritime: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
Change history
- November 9, 2026: First collected by Watch
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