Is CVE-2025-26635 in the CISA KEV catalog?

No. CVE-2025-26635 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-26635?

CVE-2025-26635 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2025-26635?

CVE-2025-26635 has an EPSS score of 1.33% (67th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-26635?

Install KB5055519 for Windows 10 Version 1809. Fixes are available for 10 affected products.

CVE & CISA-KEV Catalog

CVE-2025-26635

MEDIUM

6.5

CVSS v3

NVD

Description

Weak authentication in Windows Hello allows an authorized attacker to bypass a security feature over a network.

CWE-1390

How to fix

Remediation Available

Windows 10 Version 1809Windows

Install:KB5055519Microsoft

Windows 10 Version 21H2Windows

Install:KB5055518Microsoft

Windows 10 Version 22H2Windows

Install:KB5055518Microsoft

Windows 11 Version 22H2Windows

Install:KB5055528Microsoft

Windows 11 Version 23H2Windows

Install:KB5055528Microsoft

Windows Server 2019Windows

Install:KB5055519Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5055519Microsoft

Windows Server 2022Windows

Install:KB5055526Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5055526Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)Windows

Install:KB5055527Microsoft

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

1.33%probability of exploitation in 30 days

67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Vendor Advisory1

msrc.microsoft.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-07-03.