CVE-2026-108452: Microsoft SharePoint path traversal flaw patched in KB5002927
A path traversal vulnerability, tracked as CVE-2026-108452, affects Microsoft SharePoint Server Subscription Edition on x64 systems. The vendor rates it 8.8 under CVSS 3.1 and says an authorized, low-privileged attacker over the network could execute code without user interaction. Affected builds run from 16.0.0 up to, but not including, 16.0.20326.20190, and Microsoft's fix ships in KB5002927, dated October 13, 2026. Farms running SharePoint Workflow Manager also need KB5002799 as a prerequisite, and classic installations require an additional debug flag step. Internet scans show large numbers of SharePoint fingerprints, but these counts do not confirm which hosts are actually vulnerable, since builds, ownership, and deployment editions vary. Security teams are advised to verify builds on every server before closing the patch effort.
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