Privileged local data disclosure via improper UEFI initialization
Published May 12, 2026 · Updated May 12, 2026
Improper initialization in Intel UEFI firmware for 4th- and 5th-generation Xeon Scalable processors allows local users to disclose data. Intel has not disclosed which firmware resource is initialized incorrectly or how its contents become exposed. Exploitation requires a privileged local user, high attack complexity, and additional attack requirements; the reported consequence is data exposure only.
Summary
What happened
Improper initialization in Intel UEFI firmware for 4th- and 5th-generation Xeon Scalable processors allows local users to disclose data. Intel has not disclosed which firmware resource is initialized incorrectly or how its contents become exposed. Exploitation requires a privileged local user, high attack complexity, and additional attack requirements; the reported consequence is data exposure only.
The record
- CVE
- CVE-2025-35991
- Published
- May 12, 2026
- Updated
- May 12, 2026
- Vendor
- Topcon Positioning Systems, Inc.
- Product
- Intel UEFI Reference Firmware
- Classifications
- CWE-665
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- May 12, 2026CVE publishedPublication date reported by the CVE source.
- May 12, 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?
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- Affected versionversion=See references
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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