Local privilege escalation via use-after-free
Published Oct 13, 2026 · Updated Oct 13, 2026
Use-after-free in Microsoft Windows Search Component allows local users to elevate privileges through authorized local access. The CNA record identifies a memory-lifetime error but does not disclose the affected function, freed object, or triggering input; the vendor advisory was inaccessible during research. Existing authorized local access is required, and the disclosed consequence is privilege escalation without a stated destination privilege level.
Summary
What happened
Use-after-free in Microsoft Windows Search Component allows local users to elevate privileges through authorized local access. The CNA record identifies a memory-lifetime error but does not disclose the affected function, freed object, or triggering input; the vendor advisory was inaccessible during research. Existing authorized local access is required, and the disclosed consequence is privilege escalation without a stated destination privilege level.
The record
- CVE
- CVE-2026-83574
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Windows Server 2019
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 13, 2026CVE publishedPublication date reported by the CVE source.
- Oct 13, 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 <10.0.17763.9376
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Activity data is delayed. The latest report is Sep 28, 2026.
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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