Read the docs
TI-2021-15014 Aliases CVE-2021-36934GHSA-x4m2-px5g-5q55

Windows Elevation of Privilege Vulnerability

Priority CRITICAL 93Exploited in the wildPublished · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2022-02-10CISA due date 2022-02-24
EPSS 0.67252 99th percentileScored 2026-11-07
Fix Fixed Microsoft: 3 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows 10 Version 180910.0.17763.0 to before 10.0.17763.211410.0.17763.2114Patch availableCNA
MicrosoftWindows 10 Version 180910.0.0 to before 10.0.17763.211410.0.17763.2114Patch availableCNA
MicrosoftWindows 10 Version 190910.0.0 to before 10.0.18363.173410.0.18363.1734Patch availableCNA
MicrosoftWindows 10 Version 200410.0.0 to before 10.0.19041.116510.0.19041.1165Patch availableCNA
MicrosoftWindows 10 Version 20H210.0.0 to before 10.0.19042.116510.0.19042.1165Patch availableCNA
MicrosoftWindows 10 Version 21H110.0.0 to before 10.0.19043.116510.0.19043.1165Patch availableCNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.2114 Fixed in 10.0.17763.2114 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.2114 Fixed in 10.0.17763.2114 Patch available CNA
  • Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1734 Fixed in 10.0.18363.1734 Patch available CNA
  • Windows 10 Version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1165 Fixed in 10.0.19041.1165 Patch available CNA
  • Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1165 Fixed in 10.0.19042.1165 Patch available CNA
  • Windows 10 Version 21H1 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.1165 Fixed in 10.0.19043.1165 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*before 10.0.17763.2114VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*before 10.0.18363.1734VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*before 10.0.19041.1165VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*before 10.0.19042.1165VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*before 10.0.19043.1165VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:* Versions before 10.0.17763.2114 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:* Versions before 10.0.18363.1734 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1165 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1165 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:* Versions before 10.0.19043.1165 Vulnerable ·Microsoft

Remediation

Microsoft 3 updates

  • KB5005033
    Security Update
    • Windows 10 Version 2004 for 32-bit Systems 10.0.19041.1165
    • Windows 10 Version 2004 for ARM64-based Systems 10.0.19041.1165
    • Windows 10 Version 2004 for x64-based Systems 10.0.19041.1165
    • Windows 10 Version 20H2 for 32-bit Systems 10.0.19042.1165
    • Windows 10 Version 20H2 for ARM64-based Systems 10.0.19042.1165
    • Windows 10 Version 21H1 for 32-bit Systems 10.0.19043.1165
    • Windows 10 Version 21H1 for ARM64-based Systems 10.0.19043.1165
    • Windows 10 Version 21H1 for x64-based Systems 10.0.19043.1165
    • Windows Server, version 2004 (Server Core installation) 10.0.19041.1165
    • Windows Server, version 20H2 (Server Core Installation) 10.0.19042.1165
  • KB5005031
    Security Update
    • Windows 10 Version 1909 for 32-bit Systems 10.0.18363.1734
    • Windows 10 Version 1909 for ARM64-based Systems 10.0.18363.1734
    • Windows 10 Version 1909 for x64-based Systems 10.0.18363.1734
  • KB5005030
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.2114
    • Windows 10 Version 1809 for ARM64-based Systems 10.0.17763.2114
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.2114
    • Windows Server 2019 10.0.17763.2114
    • Windows Server 2019 (Server Core installation) 10.0.17763.2114

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
Yes
Exploitability
Exploitation More Likely

Timeline

  1. 2022-02-10 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-36934
  3. 2026-10-03 Alias added: GHSA-x4m2-px5g-5q55

References

Patch 2

Advisory 2

  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17367 MSHTML Framework Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17364 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24042 Internet Shortcut Files Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
See all 4016 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences