Internal NCryptDecrypt method could be used externally from WindowsHello library.
Published Apr 14, 2020
5.5
MEDIUMCVSS 3.1
EPSS 0.23%
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 products
-
- Version < 1.0.4StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| SeppPenner | WindowsHello | n/a |
|
- < 1.0.4
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
1 other source (GHSA) ▾
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.23% (0.00234) | 13.02th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.23% (0.00234) | 14.61th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00044) | 12.95th | v3 (v2023.03.01) |
| May 25, 2024 | 0.04% (0.00044) | 12.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 10.26th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.40% (0.01404) | 49.02th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (4)
- https://github.com/SeppPenner/WindowsHello/issues/3 x_refsource_MISCIssue TrackingThird Party Advisory
- https://github.com/SeppPenner/WindowsHello/security/advisories/GHSA-wvpv-ffcv-r6cw x_refsource_CONFIRMThird Party Advisory
- https://github.com/advisories/GHSA-wvpv-ffcv-r6cw Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-11005
| Link | Providers | Tags |
|---|---|---|
| https://github.com/SeppPenner/WindowsHello/issues/3 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://github.com/SeppPenner/WindowsHello/security/advisories/GHSA-wvpv-ffcv-r6cw | x_refsource_CONFIRMThird Party Advisory | |
| https://github.com/advisories/GHSA-wvpv-ffcv-r6cw | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-11005 |
Change history (0)
No recorded changes yet.