Local privilege escalation
Published Oct 13, 2026 · Updated Oct 13, 2026
Privilege escalation in Microsoft Windows Server Update Service allows local users to gain higher privileges through access control. Microsoft identifies insufficient access-control granularity but does not disclose the affected operation, function, or handling of untrusted input. Exploitation requires an existing low-privileged account; the resulting privilege level and role-specific exposure are not specified.
Summary
What happened
Privilege escalation in Microsoft Windows Server Update Service allows local users to gain higher privileges through access control. Microsoft identifies insufficient access-control granularity but does not disclose the affected operation, function, or handling of untrusted input. Exploitation requires an existing low-privileged account; the resulting privilege level and role-specific exposure are not specified.
The record
- CVE
- CVE-2026-83499
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Windows Server 2019
- Classifications
- CWE-1220, 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.
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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