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High severity · published Jul 14, 2026
CVE-2026-50360
Windows SMB Server Elevation of Privilege Vulnerability
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
W1
Windows 10 Version 21H2 · Microsoft
10.0.19044.0 before 10.0.19044.7548 · source: vendor
W1
Windows 10 Version 22H2 · Microsoft
10.0.19045.0 before 10.0.19045.7548 · source: vendor
W1
Windows 11 Version 24H2 · Microsoft
10.0.26100.0 before 10.0.26100.8875 · source: vendor
W1
Windows 11 Version 25H2 · Microsoft
10.0.26200.0 before 10.0.26200.8875 · source: vendor
W1
Windows 11 version 26H1 · Microsoft
10.0.28000.0 before 10.0.28000.2525 · source: vendor
WS
Windows Server 2022 · Microsoft
10.0.20348.0 before 10.0.20348.5386 · source: vendor, NVD
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.33158 · source: vendor, NVD
WS
Windows Server 2025 (Server Core installation) · Microsoft
10.0.26100.0 before 10.0.26100.33158 · source: vendor
W1
Windows 10 21h2 · Microsoft
before 10.0.19044.7548; before 10.0.19044.7548; before 10.0.19044.7548 · source: NVD
W1
Windows 10 22h2 · Microsoft
before 10.0.19045.7548; before 10.0.19045.7548; before 10.0.19045.7548 · source: NVD
W1
Windows 11 24h2 · Microsoft
before 10.0.26100.8875; before 10.0.26100.8875 · source: NVD
W1
Windows 11 25h2 · Microsoft
before 10.0.26200.8875; before 10.0.26200.8875 · source: NVD
Affected product
W1
Windows 10 Version 21H2
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-50360
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-50360
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50360
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