Physical attestation spoofing
Published Jun 9, 2026 · Updated Jun 9, 2026
Improper input validation in Microsoft attestation services on affected Windows builds allows physically proximate attackers to spoof attestations. Microsoft has not disclosed the attestation input, validation locus, or incorrect operation that accepts untrusted physical-device data. Exploitation requires physical access and high privileges and can corrupt attestation integrity without reported data disclosure or service interruption.
Summary
What happened
Improper input validation in Microsoft attestation services on affected Windows builds allows physically proximate attackers to spoof attestations. Microsoft has not disclosed the attestation input, validation locus, or incorrect operation that accepts untrusted physical-device data. Exploitation requires physical access and high privileges and can corrupt attestation integrity without reported data disclosure or service interruption.
The record
- CVE
- CVE-2026-45642
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-20
- Attack vector
- physical
- Privileges
- admin
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 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 <10.0.17763.8880
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.
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Technologies
Your stack
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Your stack
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