Strobes VIStrobes VI
CVE DatabaseThreat ActorsResearchAPI Docs
Visit Strobes.coSign Up for Strobes
CVE DatabaseThreat ActorsResearchAPI Docs
Tools
KB Lookup
Visit Strobes.coSign Up for Strobes
HomeCVEs

Do you like the insights?

Strobes vulnerability intelligence is a key component of their Exposure Management platform that helps organizations understand, prioritize, and address security vulnerabilities more effectively.

© 2026 Strobes Security. All rights reserved.
HomeCVEsCVE-2021-33739

CVE-2021-33739

Published: January 27, 2026
Last updated:6 hours ago (January 27, 2026)
Exploit: YesZero-day: YesPatch: YesTrend: Neutral
TL;DR
Updated January 27, 2026

CVE-2021-33739 is a high severity vulnerability with a CVSS score of 8.4. Exploits are available; patches have been released and should be applied urgently. This is classified as a zero-day vulnerability.

Key Points
  • 1High severity (CVSS 8.4/10)
  • 2EPSS: 20.00% - high likelihood of exploitation
  • 3Public exploits are available
  • 4Vendor patches are available
  • 5Strobes Priority Score: 815/1000 (High)
  • 6Affects products from: Microsoft
Severity Scores
CVSS v38.4
CVSS v24.6
Priority Score815.0
EPSS Score20.0
High
Exploitation LikelihoodHigh
20.00%EPSS

High probability of exploitation in the next 30 days

Prioritize patching within days
20.00%
EPSS
8.4
CVSS
Yes
Exploit
Yes
Patch
High Priority
high EPSS • exploit exists

EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.

Description

Microsoft Desktop Window Manager (DWM) Core Library contains an unspecified vulnerability that allows for privilege escalation.

CVSS v3 Breakdown
Attack Vector:Local
Attack Complexity:Local
Privileges Required:Network
User Interaction:Network
Scope:Unchanged
Confidentiality:High
Integrity:High
Availability:High
Exploit References
Cisa.govGitHubGitHub
Patch References
[email protected]Zeroday CZ
Trend Analysis
Neutral
Vulnerable Products
VendorProduct
MicrosoftWindows 10 1909
MicrosoftWindows Server 20h2
MicrosoftWindows Server 2004
MicrosoftWindows 10 20h2
MicrosoftWindows 10 21h1
MicrosoftWindows 10 2004
Advisories
CISA: Microsoft Desktop Window Manager (DWM) Core Library contains an unspecified vulnerability that allows for privilege escalation.
GitHub AdvisoryNVD
Cite This Page
APA Format
Strobes VI. (2026). CVE-2021-33739 - CVE Details and Analysis. Strobes VI. Retrieved January 27, 2026, from https://vi.strobes.co/cve/CVE-2021-33739
Quick copy link + title

Please cite this page when referencing data from Strobes VI. Proper attribution helps support our vulnerability intelligence research.