Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability
CISA lists this Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) vulnerability as known exploited. The vendor's advisory has the fixed versions.
CISA catalog record
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.
- Product
- Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
- Added to KEV
- 3 Nov 2021
- Federal remediation due
- 3 May 2022
- Known ransomware use
- Yes
What changed
First observed 14 Oct 2026No field changes in the recorded history.
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