CVE-2026-20927

CWE-362 — Race Condition5 documents5 sources

Severity

5.3MEDIUM

EPSS

0.0%

top 89.74%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Microsoft Windows 10 Version 1607 Microsoft Windows 10 Version 1809 Microsoft Windows 10 Version 21h2 +29 more

Timeline

PublishedJan 13

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to deny service over a network.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.6 | Impact: 3.6

Affected Packages31 packages

▶CVEListV5microsoft/windows_server_2008_service_pack_26.0.6003.0 — 6.0.6003.23717

▶CVEListV5microsoft/windows_server_2008_r2_service_pack_16.1.7601.0 — 6.1.7601.28117

▶CVEListV5microsoft/windows_server_2008_service_pack_2_(server_core_installation)6.0.6003.0 — 6.0.6003.23717

▶CVEListV5microsoft/windows_server_2008_r2_service_pack_1_(server_core_installation)6.1.7601.0 — 6.1.7601.28117

▶CVEListV5microsoft/windows_server_20126.2.9200.0 — 6.2.9200.25868

🔴Vulnerability Details

GHSA

GHSA-j925-72mv-w4rf: Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to den↗2026-01-13

▶

CVEList

Windows SMB Server Denial of Service Vulnerability↗2026-01-13

▶

📋Vendor Advisories

Microsoft

Windows SMB Server Denial of Service Vulnerability↗2026-01-13

▶

🕵️Threat Intelligence

Wiz

CVE-2026-20927 Impact, Exploitability, and Mitigation Steps | Wiz↗

▶