CVE-2025-48799
Windows Update Service Elevation of Privilege Vulnerability
Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- 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 Update Service Elevation of Privilege Vulnerability
Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.
- Record
CVE-2025-48799- 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/E:U/RL:O/RC:C - Weakness
- CWE-59
- Updated
- 2026-11-02
EUVDEUVD-2025-20603
Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.
- Record
EUVD-2025-20603- 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/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hc7x-m44m-xhxq
Improper link resolution before file access ('link following') in Windows Update Service allows...
Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.
- Record
GHSA-hc7x-m44m-xhxq- 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-59
- Updated
- 2026-11-02
NVD
Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.
- Record
CVE-2025-48799- 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-59
- Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 22h2
- microsoft windows 11 version 22h3
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 10 1607
- microsoft windows 10 1809
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | Wh04m1001/CVE-2025-48799 | 2025-07-08 |
| PoC in GitHub | gmh5225/CVE-2025-48799- | 2025-09-02 |
| PoC in GitHub | painoob/CVE-2025-48799 | 2025-08-05 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-48799 is a high vulnerability (CVSS 7.8) in Microsoft Windows 10 Version 1607, published July 8, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.33%, the 71st percentile. No source names a fixed version.
References
msrc.microsoft.com/update-guide/vulnerability/CVE-2025-48799
vicarius.io/vsociety/posts/cve-2025-48799-mitigation-script-elevation-of-privilege-vulnerability-in-windows-update-service
nvd.nist.gov/vuln/detail/CVE-2025-48799
github.com/advisories/GHSA-hc7x-m44m-xhxq