PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-20919 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-01-13T18:16:18.140Z and has not been modified since then. CVE-2026-20919 is a race condition vulnerability in Windows SMB Server that allows an authorized attacker to elevate privileges over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Affected products include various versions of Windows 10, Windows 11, and Windows Server. Organizations should prioritize patching this vulnerability, especially those with exposed Windows SMB Servers, to prevent potential privilege escalation attacks. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-13
Original CVE updated
2026-07-30
Advisory published
2026-01-13
Advisory updated
2026-07-30

Who should care

Organizations with exposed Windows SMB Servers, especially those in sensitive or high-risk environments, should prioritize patching this vulnerability to prevent potential privilege escalation attacks.

Technical summary

CVE-2026-20919 is a race condition vulnerability in Windows SMB Server that allows an authorized attacker to elevate privileges over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Affected products include various versions of Windows 10, Windows 11, and Windows Server, including Windows 10 1607, Windows 10 1809, Windows 10 21H2, Windows 10 22H2, Windows 11 23H2, Windows 11 24H2, Windows 11 25H2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.

Defensive priority

Organizations should prioritize patching this vulnerability, especially those with exposed Windows SMB Servers, to prevent potential privilege escalation attacks.

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to vulnerable systems
  • Implement network segmentation to limit access to sensitive areas
  • Monitor SMB Server logs for suspicious activity
  • Conduct regular vulnerability assessments and inventory checks
  • Consider compensating controls such as firewalls or intrusion detection systems

Evidence notes

The CVE-2026-20919 record indicates a race condition vulnerability in Windows SMB Server that allows an authorized attacker to elevate privileges over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Affected products include various versions of Windows 10, Windows 11, and Windows Server.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-01-13T18:16:18.140Z and has not been modified since then.