PT-2021-5229 · Microsoft · Windows

Published 2021-09-14 · Updated 2025-06-04 · CVE-2021-36955

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 Microsoft Windows (affected versions not specified)

Description The issue is related to errors in managing privileges in the Windows Common Log File System (CLFS) Driver. Exploitation of this issue may allow an attacker to elevate their privileges. It is an elevation-of-privilege vulnerability that allows attackers to affect the system.

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

Exploit

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

BDU:2021-06031

CVE-2021-36955

Affected Products

Windows

References · 14

• 🔥 https://github.com/JiaJinRong12138/CVE-2021-36955-EXP · Exploit
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36955 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36955 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-36955 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-36955 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36955 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36955 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-06031 · Security Note
• https://twitter.com/hieuuvd/status/1930166465623363617 · Twitter Post
• https://cybersecurity-help.cz/vdb/SB2021091435 · Note
• https://cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv · Note
• https://t.me/cvenotify/87804 · Telegram Post
• https://cisa.gov/known-exploited-vulnerabilities-catalog · Note
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36955 · Note