CVE-2021-36934: Microsoft Windows SAM Local Privilege Escalation Vulnerability
First published: Thu Jul 22 2021(Updated: )
If a Volume Shadow Copy (VSS) shadow copy of the system drive is available, users can read the SAM file which would allow any user to escalate privileges to SYSTEM level.
Credit: secure@microsoft.com secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows 10 | =20h2 | |
| Microsoft Windows 10 | =21h1 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows | ||
| Microsoft Windows 10 | <10.0.17763.2114 | |
| Microsoft Windows 10 | <10.0.18363.1734 | |
| Microsoft Windows 10 | <10.0.19041.1165 | |
| Microsoft Windows 10 | <10.0.19042.1165 | |
| Microsoft Windows 10 | <10.0.19043.1165 | |
| <10.0.17763.2114 | ||
| <10.0.18363.1734 | ||
| <10.0.19041.1165 | ||
| <10.0.19042.1165 | ||
| <10.0.19043.1165 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-36934?
CVE-2021-36934 has a critical severity rating due to its potential for privilege escalation.
How do I fix CVE-2021-36934?
To fix CVE-2021-36934, ensure that your Windows 10 system is updated to the latest security patch released by Microsoft.
What systems are affected by CVE-2021-36934?
CVE-2021-36934 affects multiple versions of Microsoft Windows 10, including versions 1809, 1909, 2004, 20H2, and 21H1.
What is the impact of exploiting CVE-2021-36934?
Exploiting CVE-2021-36934 allows an attacker to read the Security Account Manager (SAM) file, leading to elevation of privileges to SYSTEM level.
Is there a workaround for CVE-2021-36934 before applying a fix?
A recommended workaround for CVE-2021-36934 is to limit access to shadow copies and configure appropriate Access Control Lists (ACLs) until the patch is applied.
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/severity
- agent/title
- agent/remedy
- agent/description
- agent/event
- exploited/true
- collector/cisa-known-exploited
- source/CISA
- agent/software-canonical-lookup
- agent/author
- agent/references
- agent/source
- agent/tags
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-api
- vendor/microsoft
- canonical/microsoft windows 10
- version/microsoft windows 10/20h2
- version/microsoft windows 10/21h1
- version/microsoft windows 10/1809
- version/microsoft windows 10/1909
- version/microsoft windows 10/2004
- canonical/microsoft windows