Microsoft Windows up to Server 2004 DWM Core Library privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft Windows up to Server 2004 and classified as very critical. Affected by this vulnerability is an unknown functionality of the component DWM Core Library. The manipulation leads to an unknown weakness. This vulnerability is known as CVE-2021-33739. The attack can be launched remotely. Furthermore, there is an exploit available. It is recommended to apply a patch to fix this issue. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Microsoft Windows up to Server 2004 (Operating System). Affected is an unknown functionality of the component DWM Core Library. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 06/08/2021 as confirmed security guidance (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2021-33739. Technical details are unknown but a public exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/08/2025).

A public exploit has been developed by mavillon1 in C++ and been published 15 hours after the advisory. The exploit is shared for download at github.com. It is declared as attacked. As 0-day the estimated underground price was around $100k and more. This issue was added on 11/03/2021 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 11/17/2021:

Apply updates per vendor instructions.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Zero-Day.cz (638). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 8.4
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 8.4
CNA Vector (Microsoft): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Author: mavillon1
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

05/28/2021 🔍
06/08/2021 +11 days 🔍
06/08/2021 +0 days 🔍
06/09/2021 +0 days 🔍
06/09/2021 +0 days 🔍
03/08/2025 +1368 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2021-33739 (🔍)
GCVE (CVE): GCVE-0-2021-33739
GCVE (VulDB): GCVE-100-176520
scip Labs: https://www.scip.ch/en/?labs.20161215

Entryinfo

Created: 06/09/2021 07:38
Updated: 03/08/2025 01:36
Changes: 06/09/2021 07:38 (32), 06/09/2021 07:42 (23), 06/09/2021 20:15 (3), 06/09/2021 20:16 (4), 06/11/2021 08:51 (2), 04/21/2024 19:55 (28), 06/27/2024 16:22 (2), 07/29/2024 22:36 (26), 09/15/2024 13:07 (1), 03/08/2025 01:36 (1)
Complete: 🔍
Committer: misc
Cache ID: 216:03A:103

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