CVE-2026-33827CWE-362

CVE-2026-33827

High · published April 14, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
44.8
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00542 · 44.8th percentile
Weakness
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
2026-04-14T22:17Z
Affected products (25)
ProductVersionsFixed in
microsoft/windows_10_1607< 10.0.14393.906010.0.14393.9060
microsoft/windows_10_1607< 10.0.14393.906010.0.14393.9060
microsoft/windows_10_1809< 10.0.17763.864410.0.17763.8644
microsoft/windows_10_1809< 10.0.17763.864410.0.17763.8644
microsoft/windows_10_21h2< 10.0.19044.718410.0.19044.7184
microsoft/windows_10_21h2< 10.0.19044.718410.0.19044.7184
microsoft/windows_10_21h2< 10.0.19044.718410.0.19044.7184
microsoft/windows_10_22h2< 10.0.19045.718410.0.19045.7184
microsoft/windows_10_22h2< 10.0.19045.718410.0.19045.7184
microsoft/windows_10_22h2< 10.0.19045.718410.0.19045.7184
microsoft/windows_11_23h2< 10.0.22631.693610.0.22631.6936
microsoft/windows_11_23h2< 10.0.22631.693610.0.22631.6936
microsoft/windows_11_24h2< 10.0.26100.824610.0.26100.8246
microsoft/windows_11_24h2< 10.0.26100.824610.0.26100.8246
microsoft/windows_11_25h2< 10.0.26200.824610.0.26200.8246
microsoft/windows_11_25h2< 10.0.26200.824610.0.26200.8246
microsoft/windows_11_26h1< 10.0.28000.183610.0.28000.1836
microsoft/windows_11_26h1< 10.0.28000.183610.0.28000.1836
microsoft/windows_server_2012all versions—
microsoft/windows_server_2012all versions—
microsoft/windows_server_2016< 10.0.14393.906010.0.14393.9060
microsoft/windows_server_2019< 10.0.17763.864410.0.17763.8644
microsoft/windows_server_2022< 10.0.20348.502010.0.20348.5020
microsoft/windows_server_2022_23h2< 10.0.25398.227410.0.25398.2274
microsoft/windows_server_2025< 10.0.26100.3269010.0.26100.32690
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33827 · [email protected]
EPSS history
Timeline
  • 14 APR 16:58Z
    Windows TCP/IP Remote Code Execution Vulnerability
    cvelistv5