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PatchSiren cyber security CVE debrief

CVE-2020-3259 Cisco CVE debrief

CVE-2020-3259 is a Cisco ASA and Firepower Threat Defense information disclosure vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2024-02-15, and the KEV entry marks it as associated with known ransomware campaign use. For defenders, this makes the issue a priority even though the supplied corpus does not include full vendor advisory details or CVSS scoring.

Vendor
Cisco
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS
HIGH 7.5
CISA KEV
Listed
Original CVE published
2024-02-15
Original CVE updated
2024-02-15
Advisory published
2024-02-15
Advisory updated
2024-02-15

Who should care

Organizations running Cisco Adaptive Security Appliance (ASA) or Firepower Threat Defense (FTD), especially teams managing internet-facing edge appliances, network security operations, and incident response.

Technical summary

The official metadata supplied here identifies CVE-2020-3259 as an information disclosure vulnerability affecting Cisco ASA and FTD. CISA’s KEV record confirms the issue is known to be exploited and notes known ransomware campaign use. The provided corpus does not include the underlying Cisco advisory text, exploit mechanics, or impact specifics beyond the information disclosure classification.

Defensive priority

Urgent. CISA’s KEV listing indicates known exploitation, and the entry sets a mitigation due date of 2024-03-07.

Recommended defensive actions

  • Inventory all Cisco ASA and FTD deployments, including externally exposed appliances.
  • Apply Cisco mitigations or vendor instructions referenced by CISA as soon as possible.
  • If mitigations are unavailable, discontinue use of the product per CISA guidance.
  • Prioritize remediation for internet-facing devices and other high-risk deployments.
  • Verify mitigation or patch status against the CISA due date and document any accepted risk or exceptions.

Evidence notes

This debrief is based only on the supplied corpus and official links: the CVE record, NVD entry, and CISA KEV metadata. The corpus states the issue is a Cisco ASA/FTD information disclosure vulnerability, was added to KEV on 2024-02-15, has a due date of 2024-03-07, and is marked for known ransomware campaign use. No CVSS score, full Cisco advisory text, or additional technical details were provided.

Sources and references

Verified primary and authoritative sources

  • CVE-2020-3259 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2020-3259

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2020-3259 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2020-3259

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.