CVE-2026-33827

Windows TCP/IP Remote Code Execution Vulnerability

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

Affected

Microsoft · Windows 10 Version 1607 · Windows 10 Version 1809 · Windows 10 Version 21H2 · Windows 10 Version 22H2 · Windows 11 version 23H2 · Windows 11 Version 23H2

CVSS v3.1 MICROSOFT

8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.54% chance of exploitation in the next 30 days, 44th percentile

Published

2026-04-14

Updated

2026-10-15

Proof-of-concept exploits (1)

• kaleth4/CVE-2026-338272★ · 2026-04-22

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33827

References

• CVE Record
• NVD entry

Related

• CVE-2014-6271
• CVE-2019-7711
• CVE-2021-44228
• CVE-2022-30190
• CVE-2024-6387
• CVE-2024-6409