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

CVSS breakdown

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

Attack Vector	N	Network
Attack Complexity	L	Low
Privileges Required	N	None
User Interaction	N	None
Scope	U	Unchanged
Confidentiality	H	High
Integrity	H	High
Availability	H	High

Timeline

2020-10-20 — Published (NVD)
2021-11-03 — Added to CISA KEV (actively exploited)
2022-05-03 — CISA patch-by deadline
2026-08-12 — Last modified (NVD)

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

vmware

References

Official: NVD · CVE.org