CVE-2026-105009
Windows Server Update Service Elevation of Privilege Vulnerability
Incorrect default permissions in Windows Server Update Service 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
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Server Update Service Elevation of Privilege Vulnerability
Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-105009- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-276
- Updated
- 2026-11-02
EUVDEUVD-2026-100398
Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
- Record
EUVD-2026-100398- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-455h-gjpq-v2gc
Incorrect default permissions in Windows Server Update Service allows an authorized attacker to...
Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
- Record
GHSA-455h-gjpq-v2gc- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-276
- Updated
- 2026-11-02
NVD
Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-105009- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-276
- Updated
- 2026-11-02
Affected products
- microsoft windows server 2012
- microsoft windows server 2012 (server core installation)
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
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-2026-105009 is a high vulnerability (CVSS 7.5) in Microsoft Windows Server 2012, published October 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 25th percentile. No source names a fixed version.