Authenticated privilege escalation via heap buffer overflow
Published Sep 8, 2026 · Updated Sep 10, 2026
Heap-based buffer overflow in Microsoft Windows Biometric Service allows remote authenticated users to elevate privileges over a network. Microsoft identifies a heap overflow in the service but has not disclosed the responsible function, buffer operation, or validation failure. Exploitation requires authorized network access and grants higher Windows privileges; no broader code-execution consequence is publicly specified.
Summary
What happened
Heap-based buffer overflow in Microsoft Windows Biometric Service allows remote authenticated users to elevate privileges over a network. Microsoft identifies a heap overflow in the service but has not disclosed the responsible function, buffer operation, or validation failure. Exploitation requires authorized network access and grants higher Windows privileges; no broader code-execution consequence is publicly specified.
The record
- CVE
- CVE-2026-69773
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, T1068
- Attack vector
- network
- 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=10.0.17763.0 <10.0.17763.9245
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Weakness, pattern, technique
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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