Local privilege escalation via Bluetooth heap overflow
Published Apr 8, 2025 · Updated Aug 10, 2026
Heap-based buffer overflow in Microsoft Windows Bluetooth Service allows local users to elevate privileges on affected Windows builds. Public records identify the service heap as the locus, but Microsoft has not disclosed the malformed input or specific operation that exceeds its allocated buffer. Exploitation requires existing low-privileged local access and can grant higher privileges while affecting system confidentiality, integrity, and availability.
Summary
What happened
Heap-based buffer overflow in Microsoft Windows Bluetooth Service allows local users to elevate privileges on affected Windows builds. Public records identify the service heap as the locus, but Microsoft has not disclosed the malformed input or specific operation that exceeds its allocated buffer. Exploitation requires existing low-privileged local access and can grant higher privileges while affecting system confidentiality, integrity, and availability.
The record
- CVE
- CVE-2025-27490
- Published
- Apr 8, 2025
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-122, CWE-125, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 8, 2025CVE publishedPublication date reported by the CVE source.
- Aug 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 <10.0.26100.3775
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.
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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