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PatchSiren cyber security CVE debrief

CVE-2024-20359 Cisco CVE debrief

CVE-2024-20359 is a Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) privilege escalation vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2024-04-24. Because it is listed in KEV, defenders should treat it as actively exploited or otherwise confirmed in the wild and prioritize remediation quickly. CISA’s required action is to apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vendor
Cisco
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2024-04-24
Original CVE updated
2024-04-24
Advisory published
2024-04-24
Advisory updated
2024-04-24

Who should care

Network security teams, firewall/VPN administrators, and incident responders responsible for Cisco ASA or Cisco FTD deployments should prioritize this issue, especially where the devices are exposed to the internet or used for remote access.

Technical summary

The supplied corpus identifies the issue as a privilege escalation vulnerability affecting Cisco ASA and FTD. No further technical preconditions, attack path details, or CVSS score are provided in the supplied source material, so defenders should rely on Cisco’s advisory and mitigation guidance for product-specific validation and remediation.

Defensive priority

High

Recommended defensive actions

  • Review Cisco’s security advisory referenced by CISA for product-specific mitigation and upgrade guidance.
  • Apply vendor-recommended mitigations or updates as soon as possible.
  • If mitigations are unavailable, discontinue use of the affected product per CISA guidance.
  • Confirm which ASA/FTD devices are in scope, including externally reachable deployments.
  • Validate remediation by checking device versions and configuration against Cisco guidance.
  • Monitor affected appliances for signs of unauthorized privilege changes or suspicious administrative activity.

Evidence notes

This debrief is based on the CISA KEV entry for CVE-2024-20359, which lists the vulnerability as a Cisco ASA and FTD privilege escalation issue with dateAdded 2024-04-24 and dueDate 2024-05-01. The source metadata also points to Cisco’s security advisory and the NVD record as official references. No CVSS score or additional exploit detail was supplied in the corpus.

Official resources

CISA published the KEV entry on 2024-04-24 and set a due date of 2024-05-01. The supplied corpus does not include additional disclosure timeline details beyond the CVE and KEV dates.