CVE-2026-26128
HighPublished
Windows SMB Server Elevation of Privilege Vulnerability
- Published
- Mar 10, 2026
- Updated
- Jun 19, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Aug 26, 2026
Primary CVSS
7.8/ 10High
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Windows SMB Server Elevation of Privilege Vulnerability
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.
Exploits Kerberos reflection via Unicode normalization in Windows Active Directory to relay authentication to ADCS and MSSQL, enabling certificate-based privilege escalation.
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