CVE-2025-26686

Windows TCP/IP Remote Code Execution Vulnerability

Sensitive data storage in improperly locked memory in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

Affected

Microsoft · Windows 10 Version 1507 · Windows 10 Version 1607 · Windows 10 Version 1809 · Windows 10 Version 21H2 · Windows 10 Version 22H2 · Windows 11 version 22H2

CVSS v3.1 MICROSOFT

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

EPSS

1.40% chance of exploitation in the next 30 days, 72nd percentile

Published

2025-04-08

Updated

2026-08-10

Proof-of-concept exploits (1)

• mrk336/CVE-2025-26686-The-TCP-IP-Flaw-That-Opens-the-Gates32★ · 2025-09-16

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26686

References

• CVE Record
• NVD entry

Related

• CVE-2021-3456
• CVE-2024-10220
• CVE-2024-3094
• CVE-2025-23266
• CVE-2025-27480
• CVE-2025-2776