EUVD-2026-73511
GHSA-95pj-xwr6-mh22
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privileged access needed; AC:L as heap overflow is reliably triggerable; full CIA reflects privilege escalation to SYSTEM with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Microsoft Windows Speech allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in Microsoft Windows Speech (CWE-122) allows a local low-privileged attacker to escalate to SYSTEM-level privileges with no user interaction required. The vulnerability spans the entire modern Windows platform - Windows 10 (versions 1607 through 22H2), Windows 11 (versions 23H2 through 26H1), and Windows Server 2016 through 2025 - making the attack surface exceptionally broad. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged local account on an affected Windows system, consistent with the CVSS vector PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 with AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately captures this as a high-severity local privilege escalation with full CIA impact and no special triggering conditions beyond a low-privileged local session. … 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 that advances affected builds to or above the following fixed thresholds: Windows Server 2025 / Windows 11 24H2 to 10.0.26100.33438 (Server 2025) or 10.0.26100.9445 (Win 11 24H2); Windows 11 25H2 to 10.0.26200.9445; Windows 11 26H1 to 10.0.28000.2954; Windows 11 23H2 to 10.0.22631.7582; Windows Server 2022 to 10.0.20348.5622; Windows Server 2019 and Windows 10 Version 1809 to 10.0.17763.9245; Windows 10 Version 21H2 to 10.0.19044.7725; Windows 10 Version 22H2 to 10.0.19045.7725; Windows Server 2016 and Windows 10 Version 1607 to 10.0.14393.9512. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, contact your Microsoft account team and access the MSRC advisory for CVE-2026-69456 to identify the specific patch version for your Windows editions; prioritize Windows Server systems and high-value workstations. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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