⚠ Actively exploited
Added to CISA KEV on 2021-11-03. Federal agencies required to patch by 2021-11-17. Required action: Apply updates per vendor instructions..

CVE-2021-33739

CWE-269 — Improper Privilege Management8 documents7 sources
Severity
7.8HIGH
EPSS
19.0%
top 4.68%
CISA KEV
KEV
Added 2021-11-03
Due 2021-11-17
Exploit
Exploited in wild
Active exploitation observed
Affected products
12
Microsoft Windows 10 Version 1909Microsoft Windows 10 Version 2004Microsoft Windows 10 Version 20h2+9 more
Timeline
PublishedJun 8
KEV addedNov 3
KEV dueNov 17
Latest updateMay 24
CISA Required Action: Apply updates per vendor instructions.

Description

Microsoft DWM Core Library Elevation of Privilege Vulnerability

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.5 | Impact: 5.9

Affected Packages11 packages

▶NVDmicrosoft/windows< 10.0.19041.1052+1
▶NVDmicrosoft/windows_10_1909< 10.0.18363.1621
▶NVDmicrosoft/windows_10_2004< 10.0.19041.1052
▶NVDmicrosoft/windows_10_20h2< 10.0.19042.1052
▶NVDmicrosoft/windows_10_21h1< 10.0.19043.1052

Patches

Patch: portal.msrc.microsoft.com ↗Patch: portal.msrc.microsoft.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-4mwq-m8xw-34mr: Microsoft DWM Core Library Elevation of Privilege Vulnerability↗2022-05-24
▶
CVEList
Microsoft DWM Core Library Elevation of Privilege Vulnerability↗2021-06-08
▶
VulnCheck
Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability↗2021
▶

📋Vendor Advisories

2
CISA
Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability↗2021-11-03
▶
Microsoft
Microsoft DWM Core Library Elevation of Privilege Vulnerability↗2021-06-08
▶

🕵️Threat Intelligence

1
Krebs
Microsoft Patches Six Zero-Day Security Holes↗2021-06-08
▶
CVE-2021-33739 (HIGH CVSS 7.8) | Microsoft DWM Core Library Elevatio | cvebase.io