CVE-2026-50406: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
CVE-2026-50406 is a use-after-free vulnerability in the Windows Backup Engine of Microsoft Windows 10 Version 21H2. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating and a CVSS score of 7. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-50406) involves a use-after-free condition in the Windows Backup Engine component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation requires local access with limited privileges and no user interaction. Successful exploitation could lead to elevation of privileges, impacting confidentiality, integrity, and availability of the system. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges on the affected Windows 10 Version 21H2 system. This could allow the attacker to gain higher-level access than intended, potentially compromising system security and control.
Mitigation Recommendations
An official fix is available from Microsoft to address this vulnerability. Users and administrators should apply the provided security update as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50406 for detailed patching instructions.
CVE-2026-50406: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
Description
CVE-2026-50406 is a use-after-free vulnerability in the Windows Backup Engine of Microsoft Windows 10 Version 21H2. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating and a CVSS score of 7. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 7.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50406) involves a use-after-free condition in the Windows Backup Engine component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation requires local access with limited privileges and no user interaction. Successful exploitation could lead to elevation of privileges, impacting confidentiality, integrity, and availability of the system. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges on the affected Windows 10 Version 21H2 system. This could allow the attacker to gain higher-level access than intended, potentially compromising system security and control.
Mitigation Recommendations
An official fix is available from Microsoft to address this vulnerability. Users and administrators should apply the provided security update as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50406 for detailed patching instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T18:56:53.259Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50406","vendor":"Microsoft"}]
Threat ID: 6a56769a68715ace43f090e9
Added to database: 07/14/2026, 17:49:14 UTC
Last enriched: 07/15/2026, 00:02:32 UTC
Last updated: 07/15/2026, 00:02:32 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.