CVE-2020-3992
Act now ● On CISA KEV — actively exploited used in ransomware
Actively exploited — on the CISA KEV list.
CVSS base
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
83.0%
99.7th percentile
CISA KEV
Listed
Added 2021-11-03 · patch by 2022-05-03
Weakness / dates
CWE-416
Published 2020-10-20 · modified 2026-08-12
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.
Affected
References
- https://www.vmware.com/security/advisories/VMSA-2020-0023.html
- https://www.zerodayinitiative.com/advisories/ZDI-20-1377/
- https://www.zerodayinitiative.com/advisories/ZDI-20-1385/
- https://www.vmware.com/security/advisories/VMSA-2020-0023.html
- https://www.zerodayinitiative.com/advisories/ZDI-20-1377/
- https://www.zerodayinitiative.com/advisories/ZDI-20-1385/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3992