Local privilege escalation via COM use-after-free
Published Sep 8, 2026 · Updated Sep 10, 2026
Use-after-free in Microsoft COM for Windows allows local users with low privileges to elevate privileges on affected Windows releases. Microsoft identifies COM as the affected component but has not published the object lifetime error, callable interface, or trigger that leaves freed memory in use. Exploitation requires local low-privileged access, no user interaction, and high-complexity conditions; success crosses a local privilege boundary.
Summary
What happened
Use-after-free in Microsoft COM for Windows allows local users with low privileges to elevate privileges on affected Windows releases. Microsoft identifies COM as the affected component but has not published the object lifetime error, callable interface, or trigger that leaves freed memory in use. Exploitation requires local low-privileged access, no user interaction, and high-complexity conditions; success crosses a local privilege boundary.
The record
- CVE
- CVE-2026-69299
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26100.0 <10.0.26100.33438
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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