Local privilege escalation via CSC null dereference
Published Dec 9, 2025 · Updated Apr 16, 2026
Null pointer dereference in Microsoft Windows Client-Side Caching allows local users to elevate privileges on affected systems. Microsoft has not disclosed the affected function, the null pointer's origin, or how attacker-controlled activity reaches the dereference. Exploitation requires local low-privileged access and grants elevated control over system data and operation.
Summary
What happened
Null pointer dereference in Microsoft Windows Client-Side Caching allows local users to elevate privileges on affected systems. Microsoft has not disclosed the affected function, the null pointer's origin, or how attacker-controlled activity reaches the dereference. Exploitation requires local low-privileged access and grants elevated control over system data and operation.
The record
- CVE
- CVE-2025-62466
- Published
- Dec 9, 2025
- Updated
- Apr 16, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-476, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 9, 2025CVE publishedPublication date reported by the CVE source.
- Apr 16, 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 <10.0.17763.8146
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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