WebDAV Elevation of Privilege Vulnerability

Summary

Improper resolution of path equivalence in WebDAV allows an authorized attacker to elevate privileges over a network. Published in October 2026 Security Updates. MSRC exploitability: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely.

Why it matters

Microsoft published this item through its Security Update Guide, making it part of Patch Tuesday triage for affected Windows, cloud, or application estates. EPSS percentile: 65%.

Operator check

Review the Microsoft Security Update Guide entry for CVE-2026-102217. Confirm whether WebDAV is deployed, then apply the current security update or documented mitigation. CVSS score: 8.8. EPSS probability: 1.1%; percentile: 65%.

Sources