cve-2026-40382

CVE-2026-40382 is a Windows Telephony Service elevation-of-privilege vulnerability disclosed by Microsoft in its May 12, 2026 Security Update Guide. The advisory is sparse, lacking public proof-of-concept code or detailed exploit mechanics, but administrators should treat it as a real threat. This type of Windows plumbing flaw is often chained by attackers after gaining an initial foothold, making patching important despite the quiet advisory.