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CVE-2025-48799

HighPublished

Windows Update Service Elevation of Privilege Vulnerability

Published: Jul 8, 2025
Updated: Feb 13, 2026
Assigning CNA: microsoft
Evidence observed: Aug 8, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

1.1%

Low · next 30 days

Percentile: 63.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.

Sources

CVE-2025-48799PoC
Proof-of-concept exploit for CVE-2025-48799, a Windows Update service privilege escalation via arbitrary folder deletion with symbolic link handling, affecting multi-drive Windows 10/11 systems.
CVE-2025-48799-PoC
Proof-of-concept exploit for CVE-2025-48799, an Apache Tomcat remote code execution vulnerability. Demonstrates integer overflow exploitation via crafted HTTP headers with shellcode injection for educational research.
CVE-2025-48799PoC
Proof-of-concept exploit for CVE-2025-48799, an elevation of privilege vulnerability in Windows Update service (wuauserv) via arbitrary folder deletion and symbolic link abuse on multi-drive systems.

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