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CVE-2026-85818

Last refreshed2026-10-15

Status: UPDATED  |  Advisory ID: CVE-2026-85818

Key Details

CVECVE-2026-85818
CVSS Score / Version
9.0 (Critical) / CVSS v3.1
Updated2026-10-13
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is high; privileges required is none; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
see table below
Classified as
CWE-347 (Improper Verification of Cryptographic Signature)

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 26H2
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker to perform spoofing over a network.

What to Do

Monitor Microsoft's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-85818
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-85818

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