Is CVE-2020-3992 actively exploited?

Yes. CVE-2020-3992 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2020-3992 be exploited remotely?

The attack vector of CVE-2020-3992 has not been classified yet.

What is the CVSS score of CVE-2020-3992?

CVE-2020-3992 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2020-3992

HIGHCISA KEVIN THE WILD

CVE-2020-3992

Published: November 3, 2021

EPSS:82.69%probability of exploitation in 30 daysPercentile:99.2th

Official 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.

NVD Source

CISA KEV Advisory

VMware ESXi OpenSLP Use-After-Free Vulnerability

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.

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

VMware ESXi OpenSLP contains a use-after-free vulnerability that allows an attacker on the management network with access to port 427 to achieve remote code execution. The high EPSS score of 0.82694 indicates a significant likelihood of exploitation. This vulnerability is confirmed to be actively exploited, as it is in CISA's KEV.

This vulnerability has been actively exploited in the wild. It is remotely exploitable for attackers within the management network who can access port 427.

Recommended Action

Apply all available patches and updates for VMware ESXi. Restrict access to the management network and port 427 to only authorized personnel and systems.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2020-3992 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2020-3992 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.