CVE-2025-26686

HIGH

Windows TCP/IP < - Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2025-26686. PoCs published by mrk336, cyghtinc.

AI-analyzed exploit summary The repository provides a detailed writeup on CVE-2025-26686, a critical RCE vulnerability in the Windows TCP/IP stack due to a missing spin-lock in tcpip.sys. It includes technical analysis, pseudo-code examples, and mitigation steps but lacks actual exploit code.

Description

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

Exploits (2)

nomisec WRITEUP 32 stars
by mrk336 · poc
https://github.com/mrk336/CVE-2025-26686-The-TCP-IP-Flaw-That-Opens-the-Gates

The repository provides a detailed writeup on CVE-2025-26686, a critical RCE vulnerability in the Windows TCP/IP stack due to a missing spin-lock in tcpip.sys. It includes technical analysis, pseudo-code examples, and mitigation steps but lacks actual exploit code.

Classification
Writeup 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Theoretical
Target: Windows 10, 11, and Server editions (TCP/IP stack)
No auth needed
Prerequisites: Network access to the target system · Ability to send crafted TCP packets
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec STUB
by cyghtinc · poc
https://github.com/cyghtinc/CVE-2025-26686-poc-A-critical-RCE-vulnerability-in-Windows-TCP-IP-stack

The repository contains only a README.md with no actual exploit code, claiming a critical RCE vulnerability in the Windows TCP/IP stack but providing no technical details or PoC implementation.

Classification
Stub 90%
Attack Type
Rce
Complexity
Theoretical
Reliability
Theoretical
Target: Windows TCP/IP stack (version unspecified)
No auth needed
Prerequisites: None specified
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0138
EPSS Percentile 68.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-591
Status published
Products (17)
microsoft/windows_10_1507 < 10.0.10240.20978 (2 CPE variants)
microsoft/windows_10_1607 < 10.0.14393.7969 (2 CPE variants)
microsoft/windows_10_1809 < 10.0.17763.7136 (2 CPE variants)
microsoft/windows_10_21h2 < 10.0.19044.5737
microsoft/windows_10_22h2 < 10.0.19045.5737
microsoft/windows_11_22h2 < 10.0.22621.5189
microsoft/windows_11_23h2 < 10.0.22631.5189
microsoft/windows_11_24h2 < 10.0.26100.3775
microsoft/windows_server_2008 (2 CPE variants)
microsoft/windows_server_2008 r2 sp1
... and 7 more
Published Apr 08, 2025
Tracked Since Feb 18, 2026