November 3, 2021 · Applied Cybernetics Group
CVE-2020-3992 — VMware ESXi
known ransomware use
VMware ESXi OpenSLP Use-After-Free Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- VMware
- Product
- ESXi
- EPSS
- 99.6th percentile (score 0.903, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-3992
CISA short description
VMware ESXi OpenSLP contains a use-after-free vulnerability that allows an attacker residing in the management network with access to port 427 to perform remote code execution.
Required action
Apply updates per vendor instructions.