PatchTheCVECVE-2026-27928: Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a
CVE-2026-27928 is a high-severity flaw (CVSS 8.7) affecting windows server 2016, windows server 2019, windows server 2022. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.7 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 65%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2026-04-14 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-27928?
windows server 2016: upgrade to 10.0.14393.9060; windows server 2019: upgrade to 10.0.17763.8644; windows server 2022: upgrade to 10.0.20348.5020. Exact commands for each OS are on this page.
Is CVE-2026-27928 being exploited?
CVE-2026-27928 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-27928 affect?
CVE-2026-27928 affects windows server 2016, windows server 2019, windows server 2022. Severity is high (CVSS 8.7). Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
How urgent is CVE-2026-27928?
Priority 49/100. High severity; Remotely exploitable, no login, no user action; On your watchlist
Software pages
Windows vulnerabilities · Windows Server vulnerabilities
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