Dashboard / CVE-2026-85818

CVE-2026-85818

CRITICAL
INFO Priority: 0.04 BB Relevance: 68/100
Published: 2026-10-13 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Changed
C: High
I: High
A: High

Description

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

Weakness Classification (1)

Affected Software (30)

VendorProductVersion
Microsoft Windows 11 Version 23H2 10.0.22631.0 < 10.0.22631.7652
Microsoft Windows 11 Version 23H2 10.0.22631.0 < 10.0.22631.7652
Microsoft Windows 11 Version 24H2 10.0.26100.0 < 10.0.26100.9711
Microsoft Windows 11 Version 24H2 10.0.26100.0 < 10.0.26100.9711
Microsoft Windows 11 Version 25H2 10.0.26200.0 < 10.0.26200.9711
Microsoft Windows 11 Version 25H2 10.0.26200.0 < 10.0.26200.9711
Microsoft Windows 11 Version 26H2 10.0.26300.0 < 10.0.26300.9711
Microsoft Windows 11 Version 26H2 10.0.26300.0 < 10.0.26300.9711
Microsoft Windows 11 version 23H2 10.0.22631.0 < 10.0.22631.7652
Microsoft Windows 11 version 23H2 10.0.22631.0 < 10.0.22631.7652
Microsoft Windows 11 version 26H1 10.0.28000.0 < 10.0.28000.3231
Microsoft Windows 11 version 26H1 10.0.28000.0 < 10.0.28000.3231
Microsoft Windows Server 2022 10.0.20348.0 < 10.0.20348.5761
Microsoft Windows Server 2022 10.0.20348.0 < 10.0.20348.5761
Microsoft Windows Server 2025 10.0.26100.0 < 10.0.26100.33650
Microsoft Windows Server 2025 10.0.26100.0 < 10.0.26100.33650
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 < 10.0.26100.33650
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 < 10.0.26100.33650
microsoft windows_11_23h2 < 10.0.22631.7652
microsoft windows_11_23h2 < 10.0.22631.7652
microsoft windows_11_24h2 < 10.0.26100.9711
microsoft windows_11_24h2 < 10.0.26100.9711
microsoft windows_11_25h2 < 10.0.26200.9711
microsoft windows_11_25h2 < 10.0.26200.9711
microsoft windows_11_26h1 < 10.0.28000.3231
microsoft windows_11_26h1 < 10.0.28000.3231
microsoft windows_11_26h2 < 10.0.26300.9711
microsoft windows_11_26h2 < 10.0.26300.9711
microsoft windows_server_2022 < 10.0.20348.5761
microsoft windows_server_2025 < 10.0.26100.33650

References & Advisories (1)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

9.0 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.41%
Raw Score 0.004140
Percentile 35.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00414
2026-10-28
0.00414

Intelligence Sources

mitre ref →

External Links