CVE-2020-11005

Internal NCryptDecrypt method could be used externally from WindowsHello library.

MEDIUM
5.5
CVSS Score
Published: April 14, 2020 at 10:30 PM UTC
Updated: June 17, 2026 at 02:48 AM UTC
2 products affected across 2 vendorsWindowshelloWindowsHello

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%

Description

The WindowsHello open source library (NuGet HaemmerElectronics.SeppPenner.WindowsHello), before version 1.0.4, has a vulnerability where encrypted data could potentially be decrypted without needing authentication. If the library is used to encrypt text and write the output to a txt file, another executable could be able to decrypt the text using the static method NCryptDecrypt from this same library without the need to use Windows Hello Authentication again. This has been patched in version 1.0.4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.0.4
Affected range stops below 1.0.4, so it looks safe — our inference, not a vendor statement
v < 1.0.4
Affected range stops below 1.0.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-288CWE-327

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