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TI-2025-34903 Aliases CVE-2025-55234GHSA-9x8h-hfmc-8j5r

Windows SMB Elevation of Privilege Vulnerability

Priority MEDIUM 62CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

SMB Server might be susceptible to relay attacks depending on the configuration. An attacker who successfully exploited these vulnerabilities could perform relay attacks and make the users subject to elevation of privilege attacks. The SMB Server already supports mechanisms for hardening against relay attacks: SMB Server signing SMB Server Extended Protection for Authentication (EPA) Microsoft is releasing this CVE to provide customers with audit capabilities to help them to assess their environment and to identify any potential device or software incompatibility issues before deploying SMB Server hardening measures that protect against relay attacks. If you have not already enabled SMB Server hardening measures, we advise customers to take the following actions to be protected from these relay attacks: Assess your environment by utilizing the audit capabilities that we are exposing in the September 2025 security updates. See Support for Audit Events to deploy SMB Server Hardening—SMB Server Signing & SMB Server EPA. Adopt appropriate SMB Server hardening measures.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.20758 97th percentileScored 2026-11-07
Fix Fixed Microsoft: 16 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows 10 Version 150710.0.10240.0 to before 10.0.10240.2112810.0.10240.21128Patch availableCNA
MicrosoftWindows 10 Version 160710.0.14393.0 to before 10.0.14393.842210.0.14393.8422Patch availableCNA
MicrosoftWindows 10 Version 180910.0.17763.0 to before 10.0.17763.779210.0.17763.7792Patch availableCNA
MicrosoftWindows 10 Version 21H210.0.19044.0 to before 10.0.19044.633210.0.19044.6332Patch availableCNA
MicrosoftWindows 10 Version 22H210.0.19045.0 to before 10.0.19045.633210.0.19045.6332Patch availableCNA
MicrosoftWindows 11 version 22H210.0.22621.0 to before 10.0.22621.590910.0.22621.5909Patch availableCNA
MicrosoftWindows 11 version 22H310.0.22631.0 to before 10.0.22631.590910.0.22631.5909Patch availableCNA
MicrosoftWindows 11 Version 23H210.0.22631.0 to before 10.0.22631.590910.0.22631.5909Patch availableCNA
MicrosoftWindows 11 Version 24H210.0.26100.0 to before 10.0.26100.658410.0.26100.6584Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 16.1.7601.0 to before 6.1.7601.279296.1.7601.27929Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 to before 6.1.7601.279296.1.7601.27929Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 26.0.6003.0 to before 6.0.6003.235296.0.6003.23529Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 to before 6.0.6003.235296.0.6003.23529Patch availableCNA
MicrosoftWindows Server 20126.2.9200.0 to before 6.2.9200.256756.2.9200.25675Patch availableCNA
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 to before 6.2.9200.256756.2.9200.25675Patch availableCNA
MicrosoftWindows Server 2012 R26.3.9600.0 to before 6.3.9600.227746.3.9600.22774Patch availableCNA
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 to before 6.3.9600.227746.3.9600.22774Patch availableCNA
MicrosoftWindows Server 201610.0.14393.0 to before 10.0.14393.842210.0.14393.8422Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.842210.0.14393.8422Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.779210.0.17763.7792Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.779210.0.17763.7792Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.417110.0.20348.4171Patch availableCNA
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to before 10.0.25398.184910.0.25398.1849Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.658410.0.26100.6584Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.658410.0.26100.6584Patch availableCNA
  • Windows 10 Version 1507 VendorMicrosoft Affected 10.0.10240.0 to before 10.0.10240.21128 Fixed in 10.0.10240.21128 Patch available CNA
  • Windows 10 Version 1607 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.8422 Fixed in 10.0.14393.8422 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7792 Fixed in 10.0.17763.7792 Patch available CNA
  • Windows 10 Version 21H2 VendorMicrosoft Affected 10.0.19044.0 to before 10.0.19044.6332 Fixed in 10.0.19044.6332 Patch available CNA
  • Windows 10 Version 22H2 VendorMicrosoft Affected 10.0.19045.0 to before 10.0.19045.6332 Fixed in 10.0.19045.6332 Patch available CNA
  • Windows 11 version 22H2 VendorMicrosoft Affected 10.0.22621.0 to before 10.0.22621.5909 Fixed in 10.0.22621.5909 Patch available CNA
  • Windows 11 version 22H3 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.5909 Fixed in 10.0.22631.5909 Patch available CNA
  • Windows 11 Version 23H2 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.5909 Fixed in 10.0.22631.5909 Patch available CNA
  • Windows 11 Version 24H2 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.6584 Fixed in 10.0.26100.6584 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.27929 Fixed in 6.1.7601.27929 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation) VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.27929 Fixed in 6.1.7601.27929 Patch available CNA
  • Windows Server 2008 Service Pack 2 VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.23529 Fixed in 6.0.6003.23529 Patch available CNA
  • Windows Server 2008 Service Pack 2 (Server Core installation) VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.23529 Fixed in 6.0.6003.23529 Patch available CNA
  • Windows Server 2012 VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25675 Fixed in 6.2.9200.25675 Patch available CNA
  • Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25675 Fixed in 6.2.9200.25675 Patch available CNA
  • Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22774 Fixed in 6.3.9600.22774 Patch available CNA
  • Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22774 Fixed in 6.3.9600.22774 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.8422 Fixed in 10.0.14393.8422 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.8422 Fixed in 10.0.14393.8422 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7792 Fixed in 10.0.17763.7792 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7792 Fixed in 10.0.17763.7792 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.4171 Fixed in 10.0.20348.4171 Patch available CNA
  • Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.1849 Fixed in 10.0.25398.1849 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.6584 Fixed in 10.0.26100.6584 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.6584 Fixed in 10.0.26100.6584 Patch available CNA

CPE configurations NVD · 21

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*before 10.0.10240.21128VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*before 10.0.10240.21128VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*before 10.0.14393.8422VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*before 10.0.14393.8422VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*before 10.0.17763.7792VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*before 10.0.17763.7792VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*before 10.0.19044.6332VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*before 10.0.19045.6332VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*before 10.0.22621.5909VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*before 10.0.22631.5909VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:* Versions before 10.0.10240.21128 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:* Versions before 10.0.10240.21128 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* Versions before 10.0.14393.8422 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* Versions before 10.0.14393.8422 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* Versions before 10.0.17763.7792 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* Versions before 10.0.17763.7792 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* Versions before 10.0.19044.6332 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* Versions before 10.0.19045.6332 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* Versions before 10.0.22621.5909 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* Versions before 10.0.22631.5909 Vulnerable ·Microsoft
Show 11 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*before 10.0.26100.6508VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*r2 sp1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*r2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*before 10.0.14393.8422VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*before 10.0.17763.7792VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*before 10.0.20348.4106VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*before 10.0.25398.1849VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*before 10.0.26100.6508VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* Versions before 10.0.26100.6508 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* Versions r2 sp1 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* Versions before 10.0.14393.8422 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.7792 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.4106 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.1849 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* Versions before 10.0.26100.6508 Vulnerable ·Microsoft

Remediation

Microsoft 16 updates

  • KB5065511
    Security Only
    • Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23529
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23529
    • Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23529
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23529
  • KB5065510
    Security Only
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.27929
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.27929
  • KB5065509
    Monthly Rollup
    • Windows Server 2012 6.2.9200.25675
    • Windows Server 2012 (Server Core installation) 6.2.9200.25675
Show 13 more Microsoft updates
  • KB5065508
    Monthly Rollup
    • Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23529
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23529
    • Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23529
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23529
  • KB5065507
    Monthly Rollup
    • Windows Server 2012 R2 6.3.9600.22774
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.22774
  • KB5065474
    SecurityHotpatchUpdate
    • Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.6508
    • Windows 11 Version 24H2 for x64-based Systems 10.0.26100.6508
    • Windows Server 2025 10.0.26100.6508
    • Windows Server 2025 (Server Core installation) 10.0.26100.6508
  • KB5065468
    Monthly Rollup
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.27929
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.27929
  • KB5065432
    Security Update
    • Windows Server 2022 10.0.20348.4171
    • Windows Server 2022 (Server Core installation) 10.0.20348.4171
  • KB5065431
    Security Update
    • Windows 11 Version 22H2 for ARM64-based Systems 10.0.22621.5909, 10.0.22631.5909
    • Windows 11 Version 22H2 for x64-based Systems 10.0.22621.5909, 10.0.22631.5909
    • Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.5909
    • Windows 11 Version 23H2 for x64-based Systems 10.0.22631.5909
  • KB5065430
    Security Update
    • Windows 10 for 32-bit Systems 10.0.10240.21128
    • Windows 10 for x64-based Systems 10.0.10240.21128
  • KB5065429
    Security Update
    • Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.6332, 10.0.19043.6332
    • Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.6332, 10.0.19043.6332
    • Windows 10 Version 21H2 for x64-based Systems 10.0.19044.6332, 10.0.19043.6332
    • Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.6332, 10.0.19044.6332
    • Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.6332, 10.0.19044.6332
    • Windows 10 Version 22H2 for x64-based Systems 10.0.19045.6332, 10.0.19044.6332
  • KB5065428
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.7792
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.7792
    • Windows Server 2019 10.0.17763.7792
    • Windows Server 2019 (Server Core installation) 10.0.17763.7792
  • KB5065427
    Security Update
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.8422
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.8422
    • Windows Server 2016 10.0.14393.8422
    • Windows Server 2016 (Server Core installation) 10.0.14393.8422
  • KB5065426
    Security Update
    • Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.6584
    • Windows 11 Version 24H2 for x64-based Systems 10.0.26100.6584
    • Windows Server 2025 10.0.26100.6584
    • Windows Server 2025 (Server Core installation) 10.0.26100.6584
  • KB5065425
    Security Update
    • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1849
  • KB5065306
    Security Hotpatch Update
    • Windows Server 2022 10.0.20348.4106
    • Windows Server 2022 (Server Core installation) 10.0.20348.4106

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
Yes
Exploitability
Exploitation More Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-55234
  2. 2026-10-03 Alias added: GHSA-9x8h-hfmc-8j5r

References

Patch 1

  • TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24042 Internet Shortcut Files Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-32708 Windows Task Scheduler Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-29106 Windows MSHTML Platform Spoofing Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-19802 Windows MSHTML Platform Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
See all 1229 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences