PT-2025-28551 · Microsoft · Windows Appx Deployment Server+1

Simon Zuckerbraun · Published 2025-07-08 · Updated 2025-07-09 · CVE-2025-48820

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Windows AppX Deployment Service (affected versions not specified)

Description: The issue is related to improper link resolution before file access, also known as 'link following', in the Windows AppX Deployment Service. This allows an authorized attacker to elevate privileges locally. There is no information provided about the estimated number of potentially affected devices worldwide or real-world incidents where this issue was exploited.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

BDU:2025-08531

CVE-2025-48820

ZDI-25-577

Affected Products

Windows

Windows Appx Deployment Server

References · 9

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-48820 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-48820 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-48820 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-48820 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-25-577 · Security Note
• https://bdu.fstec.ru/vul/2025-08531 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-48820 · Security Note
• https://twitter.com/SystemTek_UK/status/1942970049590858124 · Twitter Post
• https://twitter.com/CVEnew/status/1942658161410011247 · Twitter Post