CVE-2025-53013

MEDIUMNVD 5.25.2—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.2 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 90% 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
5.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.2Exploit: None knownExposed: 0

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

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. A vulnerability present in versions 0.9.10 through 0.9.16 allows a user to authenticate to a Linux host via Himmelblau using an *invalid* Linux Hello PIN, provided the host is offline. While the user gains access to the local system, Single Sign-On (SSO) fails due to the network being down and the inability to issue tokens (due to a failure to unlock the Hello key). The core issue lies in an incorrect assumption within the acquire_token_by_hello_for_business_key function: it was expected to return a TPMFail error for an invalid Hello key when offline, but instead, a preceding nonce request resulted in a RequestFailed error, leading the system to erroneously transition to an offline success state without validating the Hello key unlock. This impacts systems using Himmelblau for authentication when operating in an offline state with Hello PIN authentication enabled. Rocky Linux 8 (and variants) are not affected by this vulnerability. The problem is resolved in Himmelblau version 0.9.17. A workaround is available for users who cannot immediately upgrade. Disabling Hello PIN authentication by setting enable_hello = false in /etc/himmelblau/himmelblau.conf will mitigate the vulnerability.

CVSS v3
5.2
EG Score
5.2(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity52% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

June 26, 2025

Last Modified

April 15, 2026

References (5)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 40× 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.

Showing the most recent 100 of 127 total refreshes for this CVE.

  1. 2026-07-30 16:27 UTCEPSS rescore
  2. 2026-07-30 01:30 UTCEPSS rescore
  3. 2026-07-28 15:35 UTCEPSS rescore
  4. 2026-07-27 17:57 UTCOSV refresh
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  9. 2026-07-23 02:58 UTCEG score recompute
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  1. 2026-07-12 05:46 UTCEPSS rescore
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  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-10 10:52 UTCOSV refresh
  5. 2026-07-09 19:09 UTCEPSS rescore
  6. 2026-07-08 15:15 UTCEPSS rescore
  7. 2026-07-07 13:45 UTCEPSS rescore
  8. 2026-07-06 16:27 UTCEPSS rescore
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  16. 2026-06-30 23:22 UTCEPSS rescore
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  22. 2026-06-27 03:08 UTCEPSS rescore
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  24. 2026-06-25 13:49 UTCEPSS rescore
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  27. 2026-06-23 21:32 UTCEPSS rescore
  28. 2026-06-22 14:25 UTCEPSS rescore
  29. 2026-06-21 20:42 UTCOSV refresh
  30. 2026-06-21 14:56 UTCEPSS rescore
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  32. 2026-06-21 01:59 UTCEPSS rescore
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  36. 2026-06-18 17:52 UTCEPSS rescore
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  42. 2026-06-14 23:17 UTCEPSS rescore
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  44. 2026-06-12 23:11 UTCEPSS rescore
  45. 2026-06-11 14:00 UTCEPSS rescore
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  47. 2026-06-10 22:18 UTCEPSS rescore
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  49. 2026-06-10 13:22 UTCEPSS rescore
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  51. 2026-06-08 14:16 UTCEPSS rescore
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  53. 2026-06-07 15:24 UTCEPSS rescore
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  55. 2026-06-06 13:47 UTCEPSS rescore
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  57. 2026-06-05 22:46 UTCEPSS rescore
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  59. 2026-06-05 06:10 UTCEPSS rescore
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  61. 2026-06-04 13:12 UTCEPSS rescore
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  63. 2026-06-03 02:40 UTCOSV refresh
  64. 2026-06-02 20:12 UTCEPSS rescore
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  66. 2026-06-01 13:51 UTCEPSS rescore
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  72. 2026-05-29 13:44 UTCEPSS rescore
  73. 2026-05-28 13:44 UTCEPSS rescore
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  75. 2026-05-28 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-53013?
CVE-2025-53013 is a medium vulnerability published on June 26, 2025. Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. A vulnerability present in versions 0.9.10 through 0.9.16 allows a user to authenticate to a Linux host via Himmelblau using an invalid Linux Hello PIN, provided the host is offline. While the user gains access to the…
When was CVE-2025-53013 disclosed?
CVE-2025-53013 was first published in the National Vulnerability Database on June 26, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-53013 actively exploited?
CVE-2025-53013 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 89.6% of all scored CVEs.
What is the CVSS score of CVE-2025-53013?
CVE-2025-53013 has a CVSS v3 base score of 5.2 (NVD).
How do I remediate CVE-2025-53013?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53013, 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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