← All Advisories

CVE-2026-72940

Last refreshed2026-10-03

Status: UPDATED  |  Advisory ID: CVE-2026-72940

Key Details

CVECVE-2026-72940
CVSS Score / Version8.8 (High) / CVSS v3.1
Updated2026-09-22
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS Proseattack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected productssee table below
Classified asCWE-122 (Heap-based Buffer Overflow)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows 11 (version 23H2)
MicrosoftWindows 11 (version 24H2)
MicrosoftWindows 11 (version 25H2)
MicrosoftWindows 11 (version 26H1)
MicrosoftWindows Server 2025
MicrosoftWindows Server 2022
MicrosoftWindows 11 version 23H2
MicrosoftWindows 11 Version 24H2
MicrosoftWindows 11 Version 25H2
MicrosoftWindows 11 version 26H1
MicrosoftWindows Server 2025 (Server Core installation)
SubsystemsCore Infrastructure, EWS Workstation Delivery/Virtualization
SectorsAll Sectors

What to Know

Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.

What to Do

Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-72940
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-72940
Vendor advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72940

About

OT-Advisories  ·  CVE  ·  NVD  ·  CVSS  ·  KEV  ·  EPSS  ·  CWE