Heap-based buffer overflow in Microsoft Windows - CVE-2026-125136
Published: November 11, 2026
Vulnerability identifier: #VU165507
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-125136
CWE-ID: CWE-122
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker on the local network to execute arbitrary code on the affected system.
The vulnerability exists due to a heap-based buffer overflow in Windows Network Connected Devices Auto-Setup Service when processing network device advertisements. A remote attacker on the local network can advertise a specially crafted network device to execute arbitrary code on the affected system.
Exploitation requires network device discovery to be enabled on the affected system.
Affected software
Microsoft Windows
How to mitigate CVE-2026-125136
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7846, 10 22H2 10.0.19045.7846, 10 1607 10.0.14393.9688, 10 1809 10.0.17763.9487, 11 23H2 10.0.22631.7711, 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974, 11 26H1 10.0.28000.3501