CVE-2021-36934
7.8 · HIGH Actively ExploitedOverview
CVE-2021-36934 is a high-severity vulnerability affecting microsoft windows_10_1809. It was published on July 22, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
An elevation of privilege vulnerability exists because of overly permissive Access Control Lists (ACLs) on multiple system files, including the Security Accounts Manager (SAM) database. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
An attacker must have the ability to execute code on a victim system to exploit this vulnerability.
After installing this security update, you must manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. Simply installing this security update will not fully mitigate this vulnerability. See KB5005357- Delete Volume Shadow Copies.
Remediation
Check the references section for vendor advisories and patches from microsoft. Update windows_10_1809 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| microsoft | windows_10_1809 | >= 0, < 10.0.17763.2114 | Affected |
| microsoft | windows_10_1909 | >= 0, < 10.0.18363.1734 | Affected |
| microsoft | windows_10_2004 | >= 0, < 10.0.19041.1165 | Affected |
| microsoft | windows_10_20h2 | >= 0, < 10.0.19042.1165 | Affected |
| microsoft | windows_10_21h1 | >= 0, < 10.0.19043.1165 | Affected |
References
Frequently Asked Questions
What is CVE-2021-36934?
CVE-2021-36934 is a high-severity vulnerability affecting microsoft windows_10_1809. It was published on July 22, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.
How severe is CVE-2021-36934?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-36934?
Check the references section for vendor advisories and patches from microsoft. Update windows_10_1809 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-36934?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-36934 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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