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PatchSiren cyber security CVE debrief

CVE-2020-3952 VMware CVE debrief

CVE-2020-3952 is a VMware vCenter Server information disclosure vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2021-11-03. Because it is in KEV, defenders should treat it as a high-priority remediation item and apply vendor updates per VMware instructions.

Vendor
VMware
Product
vCenter Server
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

Organizations running VMware vCenter Server, especially teams responsible for virtualization infrastructure, patch management, and security operations, should prioritize this CVE. It is also relevant to incident response teams because CISA lists it as known exploited.

Technical summary

The available official sources identify this issue as an information disclosure vulnerability in VMware vCenter Server. The corpus does not provide affected versions, attack path details, or CVSS scoring, so the safest evidence-based conclusion is limited to the product, vulnerability class, and KEV status. CISA’s entry directs defenders to apply updates per vendor instructions.

Defensive priority

Urgent. CISA’s Known Exploited Vulnerabilities catalog indicates this CVE has known exploitation risk and should be remediated promptly, even though the corpus does not include a CVSS score.

Recommended defensive actions

  • Apply VMware updates and follow the vendor’s remediation instructions.
  • Confirm whether any vCenter Server instances in your environment are affected.
  • Prioritize exposed or internet-reachable management systems for immediate review.
  • Validate patch status and document remediation in vulnerability management records.
  • Monitor for indicators of compromise and unusual access to vCenter-related systems as part of normal defensive monitoring.

Evidence notes

This debrief is based only on the supplied official corpus: the CISA KEV entry, the CVE record, and the NVD detail page. The corpus confirms the vendor (VMware), product (vCenter Server), vulnerability class (information disclosure), and KEV listing date (2021-11-03). No additional technical specifics were supplied, so no affected version, exploit method, or severity score is asserted here.

Sources and references

Verified primary and authoritative sources

  • CVE-2020-3952 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2020-3952

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

  • CVE-2020-3952 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2020-3952

    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.