CVE-2026-50406
Windows Backup Engine Elevation of Privilege Vulnerability
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Backup Engine Elevation of Privilege Vulnerability
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-50406- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2026-44083
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
- Record
EUVD-2026-44083- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c4wh-pp4w-w8fw
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
- Record
GHSA-c4wh-pp4w-w8fw- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-50406- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-50406 is a high vulnerability (CVSS 7.0) in Microsoft Windows 10 Version 21h2, published July 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.28%, the 20th percentile. No source names a fixed version.