CISA KEVRansomware Use Known

CVE-2020-3580

Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability

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.

VendorCisco

ProductAdaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

EPSS85.6%

Added to KEVNov 03, 2021

Remediation DueMay 03, 2022

Known Ransomware UseYes

CWECWE-79

Required Action

Apply updates per vendor instructions.

From Disclosure to Action

Know how quickly you need to move.

For CVE-2020-3580, added to the catalogue on Nov 03, 2021 with a remediation deadline of May 03, 2022.

Added to KEVNov 03, 2021

Seraph AlertSame day

Remediation DueMay 03, 2022

ValidationOngoing

Overdue1639 days overdue

Recommended action: Apply vendor remediation guidance.

Seraph Context

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Exploitation Context

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References

https://nvd.nist.gov/vuln/detail/CVE-2020-3580

More from Cisco in the KEV catalogue.

CVE-2026-20349Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Added Aug 11, 2026 CVE-2026-20316Secure Firewall Management Center (FMC)Added Jul 29, 2026 CVE-2008-4128IOSAdded Jul 13, 2026

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