CVE-2020-3992

CriticalCVSS 9.8/10Known exploited (CISA KEV)Last modified Aug 12, 2026

Description

OpenSLP as used in VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202010401-SG, 6.5 before ESXi650-202010401-SG) has a use-after-free issue. A malicious actor residing in the management network who has access to port 427 on an ESXi machine may be able to trigger a use-after-free in the OpenSLP service resulting in remote code execution.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
n/a	VMware ESXi	VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202010401-SG, 6.5 before ESXi650-202010401-SG)

References

https://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1377/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-20-1385/Third Party Advisory, VDB Entry
https://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1377/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-20-1385/Third Party Advisory, VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3992US Government Resource

Timeline

Published: Oct 20, 2020
Last modified: Aug 12, 2026
Added to CISA KEV: Nov 3, 2021
NVD status: Analyzed

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