CVE-2020-11005

MEDIUMNVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.1
EG Score
5.1(medium)
EPSS
14.4%
KEV
Not listed

Published

April 14, 2020

Last Modified

November 21, 2024

References (4)

Affected Packages

(1 across 1 ecosystem)
NuGet(1)
PackageVulnerable rangeFixed inDependents
HaemmerElectronics.SeppPenner.WindowsHello1.0.0, 1.0.0.1, 1.0.2, 1.0.31.0.4—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:05 UTCEPSS rescore
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  7. 2026-07-19 14:25 UTCOSV refresh
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  1. 2026-07-02 01:17 UTCOSV refresh
  2. 2026-07-01 15:03 UTCEPSS rescore
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  4. 2026-06-30 23:20 UTCEPSS rescore
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  35. 2026-06-14 05:13 UTCOSV refresh
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  67. 2026-05-27 05:13 UTCEG score recompute
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  72. 2026-05-24 05:27 UTCOSV refresh

Frequently asked(5)

What is CVE-2020-11005?
CVE-2020-11005 is a medium vulnerability published on April 14, 2020. 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…
When was CVE-2020-11005 disclosed?
CVE-2020-11005 was first published in the National Vulnerability Database on April 14, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-11005 actively exploited?
CVE-2020-11005 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-11005?
CVE-2020-11005 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2020-11005?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-11005, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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