CVE-2026-25188

HIGH
2026-03-10 [email protected]
8.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Mar 10, 2026 - 18:18 nvd
HIGH 8.8

Tags

Buffer Overflow Heap Overflow Microsoft Windows 10 1607 Windows 11 25h2 Windows Server 2012 Windows 10 22h2 Windows 11 24h2 Windows 10 1809 Windows Server 2019 Windows 11 26h1 Windows Server 2016 Windows Server 2022 Windows Server 2022 23h2 Windows 11 23h2 Windows 10 21h2 Windows Server 2025 Windows

Description

Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate privileges over an adjacent network.

Analysis

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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Remediation

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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Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +44
POC: 0

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CVE-2026-25188 vulnerability details – vuln.today
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