Remote code execution via heap buffer overflow
Published Sep 8, 2026 · Updated Sep 10, 2026
Heap-based buffer overflow in the Windows Event Logging Service allows remote attackers to execute code over a network. Microsoft identifies the fault as heap memory corruption but has not disclosed the affected function, input format, or incorrect copy operation. Exploitation requires no prior privileges but does require user interaction; success grants code execution in the service context.
Summary
What happened
Heap-based buffer overflow in the Windows Event Logging Service allows remote attackers to execute code over a network. Microsoft identifies the fault as heap memory corruption but has not disclosed the affected function, input format, or incorrect copy operation. Exploitation requires no prior privileges but does require user interaction; success grants code execution in the service context.
The record
- CVE
- CVE-2026-69495
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
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=10.0.17763.0 <10.0.17763.9245
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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