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PatchSiren cyber security CVE debrief

CVE-2020-3452 Cisco CVE debrief

CVE-2020-3452 affects Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) and is described as a read-only path traversal vulnerability. CISA has included it in the Known Exploited Vulnerabilities catalog, so affected deployments should be treated as urgent patching and validation candidates.

Vendor
Cisco
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Security teams and administrators responsible for Cisco ASA or Firepower Threat Defense appliances, especially systems that are internet-facing or provide remote access services.

Technical summary

The supplied source corpus identifies CVE-2020-3452 as a Cisco ASA and FTD read-only path traversal vulnerability. CISA’s KEV entry marks it as a known exploited issue and directs operators to apply updates per vendor instructions. The corpus does not provide a CVSS score.

Defensive priority

High. Because CISA lists this CVE in KEV, exposed Cisco ASA/FTD devices should be prioritized for immediate inventory, patching, and post-remediation verification.

Recommended defensive actions

  • Inventory all Cisco ASA and Firepower Threat Defense deployments.
  • Apply updates per Cisco vendor instructions as soon as possible.
  • Prioritize internet-facing or remotely accessible appliances for remediation.
  • Verify that affected devices are running the remediated software version after updating.
  • Review Cisco and CISA advisories for any additional guidance tied to this CVE.

Evidence notes

This debrief is based on the supplied CISA KEV source item, which names the issue as "Cisco ASA and FTD Read-Only Path Traversal Vulnerability," identifies Cisco as the vendor, and marks the CVE as known exploited. Official reference links supplied in the corpus include the CVE record, NVD detail, and CISA KEV catalog. No CVSS score was provided in the source corpus.

Official resources

Publicly disclosed CVE; CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03. The supplied source marks knownRansomwareCampaignUse as Unknown.