CVE record · CVE-2026-83907

Windows Hello Information Disclosure Vulnerability

CVSS 5.5 MediumEPSS 0.0093 · 60th percentile

Published by the CVE Program (CNA: microsoft) at 13 Oct 2026, 19:01 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Windows 10 Version 21H2	affected 10.0.19044.0 to before 10.0.19044.7807 custom
Microsoft	Windows 10 Version 22H2	affected 10.0.19045.0 to before 10.0.19045.7807 custom
Microsoft	Windows 11 version 23H2	affected 10.0.22631.0 to before 10.0.22631.7652 custom
Microsoft	Windows 11 Version 23H2	affected 10.0.22631.0 to before 10.0.22631.7652 custom
Microsoft	Windows 11 Version 24H2	affected 10.0.26100.0 to before 10.0.26100.9711 custom
Microsoft	Windows 11 Version 25H2	affected 10.0.26200.0 to before 10.0.26200.9711 custom
Microsoft	Windows 11 version 26H1	affected 10.0.28000.0 to before 10.0.28000.3231 custom
Microsoft	Windows 11 Version 26H2	affected 10.0.26300.0 to before 10.0.26300.9711 custom

Identifiers: CVE-2026-83907
CNA: microsoft
Weakness (CWE): CWE-497
Tags: Microsoft Windows 10 Version 21H2
Microsoft Windows 10 Version 22H2
Microsoft Windows 11 version 23H2
Microsoft Windows 11 Version 24H2
Microsoft Windows 11 Version 25H2
Microsoft Windows 11 version 26H1
Microsoft Windows 11 Version 26H2
Information disclosure
Published: 13 Oct 2026
Updated: 31 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.5	Medium	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.0093, the 60th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

13 Oct 2026, 19:01 UTC Confirmed by the CVE List
31 Oct 2026, 16:26 UTC First seen by agentprime

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83907 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.