Local privilege escalation via TOCTOU race
Published Mar 12, 2024 · Updated May 3, 2025
A TOCTOU race condition in Microsoft Windows Print Spooler allows local users to elevate privileges on affected Windows releases. The spooler checks a resource and later uses it after mutable state can change, but Microsoft has not disclosed the exact resource or code path. A low-privileged local user must win the high-complexity race; successful exploitation grants elevated control without user interaction.
Summary
What happened
A TOCTOU race condition in Microsoft Windows Print Spooler allows local users to elevate privileges on affected Windows releases. The spooler checks a resource and later uses it after mutable state can change, but Microsoft has not disclosed the exact resource or code path. A low-privileged local user must win the high-complexity race; successful exploitation grants elevated control without user interaction.
The record
- CVE
- CVE-2024-21433
- Published
- Mar 12, 2024
- Updated
- May 3, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-367, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 12, 2024CVE publishedPublication date reported by the CVE source.
- May 3, 2025Record 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=10.0.10240.0 <10.0.10240.20526
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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