EUVD-2026-56360
GHSA-42r2-46mq-xw84
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low privileges required; high complexity reflects race condition timing dependency; full CIA impact upon successful privilege escalation to SYSTEM within unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via use-after-free memory corruption in the Windows Telephony Service (TAPI) affects virtually every supported Windows desktop and server release, from Windows 10 1607 through Windows 11 25H2 and Windows Server 2012 through 2025. An authorized local attacker with low-privilege credentials can exploit a race condition to corrupt freed memory within the telephony service process, achieving full compromise of confidentiality, integrity, and availability. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to have an active local authenticated session on the target Windows machine with at least low-privileged (standard user) credentials - confirmed by CVSS PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.0 with vector AV:L/AC:H/PR:L correctly captures the two primary risk moderators: local access requirement and high attack complexity, both of which substantially reduce real-world exploitability compared to network-vectored or low-complexity flaws. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft security update corresponding to the installed Windows version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server 2012-2025 systems in your environment to quantify exposure. …
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External POC / Exploit Code
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