Local privilege escalation
Published Mar 10, 2026 · Updated Mar 10, 2026
Improper authentication in Microsoft Windows SMB Server allows local users with low privileges to elevate privileges on affected Windows systems. Microsoft has not disclosed the affected SMB Server authentication path or the incorrect operation performed on attacker-controlled input. Exploitation requires prior low-privileged local access, and Microsoft has not published the resulting privilege level.
Summary
What happened
Improper authentication in Microsoft Windows SMB Server allows local users with low privileges to elevate privileges on affected Windows systems. Microsoft has not disclosed the affected SMB Server authentication path or the incorrect operation performed on attacker-controlled input. Exploitation requires prior low-privileged local access, and Microsoft has not published the resulting privilege level.
The record
- CVE
- CVE-2026-26128
- Published
- Mar 10, 2026
- Updated
- Mar 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-287, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 10, 2026CVE publishedPublication date reported by the CVE source.
- Mar 10, 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 <10.0.17763.8511
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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