Affects Windows Hello; network-based bypass could grant access across Windows endpoints.
CVE-2026-27928
Network-based bypass of Windows Hello authentication.
Is CVE-2026-27928 being exploited?
Not confirmed. CVE-2026-27928 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.41% probability of exploitation in the next 30 days.
How severe is CVE-2026-27928?
CVE-2026-27928 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-27928?
Yes. A fix has been recorded for CVE-2026-27928. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27928 affect?
CVE-2026-27928 affects Windows Hello-enabled Windows OS (Windows 10/11). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27928?
Patch when released; restrict network access to devices using Windows Hello.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote bypass of Windows Hello authentication, enabling unauthorized access over the network.
Immediate action required
- affected>= 10.0.14393.0 and < 10.0.14393.9060
- affected>= 10.0.14393.0 and < 10.0.14393.9060
- affected>= 10.0.17763.0 and < 10.0.17763.8644
- affected>= 10.0.17763.0 and < 10.0.17763.8644
- affected>= 10.0.20348.0 and < 10.0.20348.5020
- affected>= 10.0.25398.0 and < 10.0.25398.2274
- affected>= 10.0.26100.0 and < 10.0.26100.32690
- affected>= 10.0.26100.0 and < 10.0.26100.32690
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.