Cisco ASA/FTD zero-days used in the ArcaneDoor espionage campaign
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
Cisco Talos disclosed ArcaneDoor, a state-sponsored campaign against perimeter devices that exploited two Cisco Adaptive Security Appliance and Firepower Threat Defense zero-days: a denial of service (CVE-2024-20353) and a persistent local code execution bug (CVE-2024-20359), used to plant the Line Dancer and Line Runner implants. Added to the CISA KEV catalog on 2024-04-24.
Why this severity: CVSS 8.6 (v3.1, CNA), actively exploited (CISA KEV)
- Started
- Apr 24, 2024
- Closed
- Apr 24, 2024
Affected
- See vendor advisory (versions are not listed in the KEV record)
Fixed in
- See vendor advisory linked in sources
Timeline5
Advisories5
News & write-ups1
Notes & caveats
Derived from the CISA KEV JSON feed (catalogVersion 2026.10.21); CVSS from the CVE record (cveawg.mitre.org). startedAt is the CVE publication date when it fell in 2024 before the KEV listing, else the KEV dateAdded; exploitation may have begun earlier. closedAt is the KEV listing date (a fix or mitigation was available then unless noted).
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