Vulnerability in Microsoft Windows App
CVE-2026-21517
Improper link resolution before file access ('link following') in Windows App for Mac allows an authorized attacker to elevate privileges locally.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Microsoft Windows App
- Microsoft Windows App For Mac — versions 11.0.0
Weakness classification (CWE)
References
- Windows App for Mac Installer Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-21517?
- CVE-2026-21517 is a medium-severity vulnerability in Microsoft Windows App, classified under Improper Link Resolution Before File Access. CVSS score: 4.7/10. Published 2026-02-10.
- How severe is CVE-2026-21517?
- Medium severity. CVSS v3 base score is 4.7 out of 10.