by Kastro
Paper/Archive/CVE-2026-56188

CVE-2026-56188

Microsoft Windows 10 Version 1607 — Windows Server Network driver Remote Code Execution Vulnerability

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 48.9.489 × 209.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Server Network driver allows an unauthorized attacker to execute code over a network.

Affected

ProductAffectedFixed inSource
Windows 10 Version 160710.0.14393.0 – < 10.0.14393.933910.0.14393.9339CNA
Windows 10 Version 180910.0.17763.0 – < 10.0.17763.902010.0.17763.9020CNA
Windows 10 Version 21H210.0.19044.0 – < 10.0.19044.754810.0.19044.7548CNA
Windows 10 Version 22H210.0.19045.0 – < 10.0.19045.754810.0.19045.7548CNA
Windows 11 Version 24H210.0.26100.0 – < 10.0.26100.887510.0.26100.8875CNA
Windows 11 Version 25H210.0.26200.0 – < 10.0.26200.887510.0.26200.8875CNA
Windows 11 version 26H110.0.28000.0 – < 10.0.28000.252510.0.28000.2525CNA
Windows Server 20126.2.9200.0 – < 6.2.9200.262266.2.9200.26226CNA
Windows Server 2012 (Server Core installation)6.2.9200.0 – < 6.2.9200.262266.2.9200.26226CNA
Windows Server 2012 R26.3.9600.0 – < 6.3.9600.232916.3.9600.23291CNA
Windows Server 2012 R2 (Server Core installation)6.3.9600.0 – < 6.3.9600.232916.3.9600.23291CNA
Windows Server 201610.0.14393.0 – < 10.0.14393.933910.0.14393.9339CNA

Scores by source

microsoft (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-56188