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Vulnerability details

CVE-2026-72949

Microsoft Windows 11Microsoft Windows Server

Windows SMB Server Network Transport Driver (srvnet.sys) Denial of Service Vulnerability

CVSS 3.1
7.5High

Official description

Null pointer dereference in Windows SMB Server Network Transport Driver (srvnet.sys) allows an unauthorized attacker to deny service over a network.

CVSS scores

ScoreVersionSourceVector
7.5High 3.1 CVEProject cvelistV5 (CNA) (microsoft) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Affected products

VendorProductVersionsSource
Microsoft Windows 11 Version 24H2 10.0.26100.0 ≤ v < 10.0.26100.9445 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 Version 25H2 10.0.26200.0 ≤ v < 10.0.26200.9445 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 version 23H2 10.0.22631.0 ≤ v < 10.0.22631.7582 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 version 23H2 10.0.22631.0 ≤ v < 10.0.22631.7582 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 version 26H1 10.0.28000.0 ≤ v < 10.0.28000.2954 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2022 10.0.20348.0 ≤ v < 10.0.20348.5622 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2025 10.0.26100.0 ≤ v < 10.0.26100.33438 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ≤ v < 10.0.26100.33438 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-09-08
Last updated
2026-10-31
State
Published
Assigner (CNA)
microsoft

Exploit prediction (EPSS)

1.17%
Probability of exploitation in 30 days
67.7%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
None
Technical impact
Partial

Weaknesses (CWE)

  • CWE-476
    NULL Pointer Dereference