CVE-2026-69275 Microsoft CVE debrief

Who should care

Defenders responsible for Windows systems, especially those with high-risk exposure, should prioritize patching affected systems to prevent potential privilege escalation.

Why it matters

CVE-2026-69275 is a high-severity elevation of privilege vulnerability in the Kernel Streaming WOW Thunk Service Driver. Defenders should prioritize patching affected Windows systems to prevent potential privilege escalation. The vulnerability has a CVSS score of 7 and requires verification of patch deployment and system configuration.

• Potential elevation of privileges on affected Windows systems.
• Increased risk for authorized attackers to gain higher privileges.
• Possible impact on system security and integrity.
• Requires verification of patch deployment and system configuration.

Technical summary

The vulnerability exists in the Kernel Streaming WOW Thunk Service Driver, allowing an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7 and is classified as HIGH severity. The vulnerability allows an attacker to elevate privileges locally, potentially impacting system security and integrity. The vulnerability is a use after free issue in the Kernel Streaming WOW Thunk Service Driver.

Defensive priority

Defenders should prioritize patching affected Windows systems, especially those with high-risk exposure, to prevent potential privilege escalation.

Recommended defensive actions

• Patch affected Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, and
• Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025 systems.
• Verify patch deployment and system configuration to ensure vulnerability is remediated.

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or impact. The vulnerability exists in the Kernel Streaming WOW Thunk Service Driver, allowing an authorized attacker to elevate privileges locally. Evidence is limited, and defenders should verify patch deployment and system configuration to ensure vulnerability is remediated. There is no information on known or unknown affected scope. The CVE Program record and N

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.