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TI-2026-42196 Aliases CVE-2026-58627GHSA-v2gx-jj2v-qjcg

Windows DHCP Server Denial of Service Vulnerability

Priority MEDIUM 41CWE-400Published · Updated

Key facts

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

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

Summary

Uncontrolled resource consumption in Windows DHCP Server allows an unauthorized attacker to deny service over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01174 67th percentileScored 2026-11-07
Fix Fixed Microsoft: 6 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

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 160710.0.14393.0 to before 10.0.14393.933910.0.14393.9339Patch availableCNA
MicrosoftWindows 10 Version 180910.0.17763.0 to before 10.0.17763.902010.0.17763.9020Patch availableCNA
MicrosoftWindows Server 20126.2.9200.0 to before 6.2.9200.262266.2.9200.26226Patch availableCNA
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 to before 6.2.9200.262266.2.9200.26226Patch availableCNA
MicrosoftWindows Server 2012 R26.3.9600.0 to before 6.3.9600.232916.3.9600.23291Patch availableCNA
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 to before 6.3.9600.232916.3.9600.23291Patch availableCNA
MicrosoftWindows Server 201610.0.14393.0 to before 10.0.14393.933910.0.14393.9339Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.933910.0.14393.9339Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.902010.0.17763.9020Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.902010.0.17763.9020Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.538610.0.20348.5386Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.3315810.0.26100.33158Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.3315810.0.26100.33158Patch availableCNA
  • Windows 10 Version 1607 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.9339 Fixed in 10.0.14393.9339 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.9020 Fixed in 10.0.17763.9020 Patch available CNA
  • Windows Server 2012 VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.26226 Fixed in 6.2.9200.26226 Patch available CNA
  • Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.26226 Fixed in 6.2.9200.26226 Patch available CNA
  • Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.23291 Fixed in 6.3.9600.23291 Patch available CNA
  • Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.23291 Fixed in 6.3.9600.23291 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.9339 Fixed in 10.0.14393.9339 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.9339 Fixed in 10.0.14393.9339 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.9020 Fixed in 10.0.17763.9020 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.9020 Fixed in 10.0.17763.9020 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.5386 Fixed in 10.0.20348.5386 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.33158 Fixed in 10.0.26100.33158 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.33158 Fixed in 10.0.26100.33158 Patch available CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*before 10.0.14393.9339VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*before 10.0.14393.9339VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*before 10.0.17763.9020VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*before 10.0.17763.9020VulnerableMicrosoft
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:*:*:*:*:-:*:x64:*before 10.0.14393.9339VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:-:*:x64:*before 10.0.17763.9020VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*before 10.0.20348.5386VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*before 10.0.26100.33158VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* Versions before 10.0.14393.9339 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* Versions before 10.0.14393.9339 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* Versions before 10.0.17763.9020 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* Versions before 10.0.17763.9020 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:*:*:*:*:-:*:x64:* Versions before 10.0.14393.9339 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:-:*:x64:* Versions before 10.0.17763.9020 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:* Versions before 10.0.20348.5386 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* Versions before 10.0.26100.33158 Vulnerable ·Microsoft

Remediation

Microsoft 6 updates

  • KB5099540
    Security Update
    • Windows Server 2022 10.0.20348.5386
    • Windows Server 2022 (Server Core installation) 10.0.20348.5386
  • KB5099538
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9020
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.9020
    • Windows Server 2019 10.0.17763.9020
    • Windows Server 2019 (Server Core installation) 10.0.17763.9020
  • KB5099536
    Security Update
    • Windows Server 2025 10.0.26100.33158
    • Windows Server 2025 (Server Core installation) 10.0.26100.33158
Show 3 more Microsoft updates
  • KB5099535
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9339
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.9339
    • Windows Server 2016 10.0.14393.9339
    • Windows Server 2016 (Server Core installation) 10.0.14393.9339
  • KB5099445
    Monthly Rollup
    • Windows Server 2012 6.2.9200.26226
    • Windows Server 2012 (Server Core installation) 6.2.9200.26226
  • KB5099444
    Monthly Rollup
    • Windows Server 2012 R2 6.3.9600.23291
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.23291

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Denial of Service
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Unlikely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58627
  2. 2026-10-03 Alias added: GHSA-v2gx-jj2v-qjcg

References

Patch 1

  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17367 MSHTML Framework Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17364 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
See all 3427 →

Sources

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