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CVE-2020-11005

16
FAUCET Score

CVE-2020-11005 describes a vulnerability in the WindowsHello open-source library (HaemmerElectronics.SeppPenner.WindowsHello) prior to version 1.0.4, where encrypted data could be decrypted without re-authentication. Specifically, if the library encrypted text to a file, another executable could use the NCryptDecrypt method to access it without requiring Windows Hello authentication. This medium-severity vulnerability (CVSS 5.5) has a local attack vector with low complexity, potentially leading to high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.4CPE matchmatch criteria
cpe:2.3:a:windowshello_project:windowshello:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.1MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.4
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
14.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 63rd percentile among its peer group of 15,937 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

nugetpatch availablevia ghsa
Product: HaemmerElectronics.SeppPenner.WindowsHelloFixed in: 1.0.4

Vendor Advisories (1)

nugetGHSA-wvpv-ffcv-r6cwmedium

Internal NCryptDecrypt method could be used externally from WindowsHello library.

Apr 14, 2020

References

github.com / SeppPenner/WindowsHello/issues/3
Issue TrackingThird Party Advisory
github.com / SeppPenner/WindowsHello/security/advisories/GHSA-wvpv-ffcv-r6cw
Third Party Advisory