Windows CVE-2026-25188
HIGHCVSS VectorNVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate privileges over an adjacent network.
AnalysisAI
Privilege escalation in Windows Telephony Service through heap buffer overflow affects Windows 10 1607, Windows 11 25h2, and Windows Server 2012, allowing adjacent network attackers to gain elevated system access without authentication. The vulnerability has a high CVSS score of 8.8 but currently lacks a patch, creating significant risk for exposed systems. …
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RemediationAI
Within 24 hours: Identify and inventory all Windows systems with Telephony Service enabled; disable the service on non-essential systems and restrict network access to Telephony Service ports. Within 7 days: Implement network segmentation to isolate systems running Telephony Service; deploy enhanced monitoring for suspicious Telephony Service activity; brief IT and security teams on incident response procedures. …
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