Is CVE-2021-31955 actively exploited?

Yes. CVE-2021-31955 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-31955 be exploited remotely?

The attack vector of CVE-2021-31955 has not been classified yet.

What is the CVSS score of CVE-2021-31955?

CVE-2021-31955 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-31955

HIGHCISA KEVIN THE WILD

CVE-2021-31955

Published: November 3, 2021

EPSS:4.65%probability of exploitation in 30 daysPercentile:89.1th

Official Description

Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.

NVD Source

CISA KEV Advisory

Microsoft Windows Kernel Information Disclosure Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2021-11-17

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

An unspecified vulnerability in the Microsoft Windows Kernel allows attackers to disclose sensitive information, specifically reading kernel memory from a user-mode process. This is a high-severity issue, and its inclusion in CISA's KEV catalog with an EPSS score of 0.04647 confirms active exploitation, making it an urgent priority.

This flaw is actively exploited in the wild, as evidenced by its presence in CISA's KEV catalog. Exploitation typically requires local access to the system.

Recommended Action

Users should apply the latest security updates for Microsoft Windows to patch this kernel vulnerability. Regular system patching is crucial for maintaining security.

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-2021-31955 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-2021-31955 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.