PT-2021-3921 · Microsoft · Windows

Published 2021-07-13 · Updated 2025-10-29 · CVE-2021-31979

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows (affected versions not specified)

Description The issue is related to insecure privilege management in the Windows kernel. It allows an attacker to elevate their privileges. The estimated number of potentially affected devices worldwide is not specified. There is no information about real-world incidents where this issue was exploited.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Buffer Overflow

Improper Privilege Management

Weakness Enumeration

CWE-119

CWE-269

Related Identifiers

BDU:2021-04438

CVE-2021-31979

Affected Products

Windows

References · 18

• https://osv.dev/vulnerability/CVE-2021-31979 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/667109 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-31979 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31979 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31979 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-31979 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31979 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04438 · Security Note
• https://t.me/true_secator/1926 · Telegram Post
• https://t.me/cvenotify/87601 · Telegram Post
• https://t.me/cibsecurity/26158 · Telegram Post
• https://t.me/cvenotify/17610 · Telegram Post
• https://t.me/true_secator/1917 · Telegram Post
• https://t.me/cveNotify/140862 · Telegram Post
• https://cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv · Note