CVE-2025-70888

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-25. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

An issue in mtrojnar Osslsigncode affected at v2.10 and before allows a remote attacker to escalate privileges via the osslsigncode.c component

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
38.4%
KEV
Not listed

Published

March 25, 2026

Last Modified

April 2, 2026

Advisory Details (3)

Auto-updated May 18, 2026
No patch confirmed yet.
generic

bug: Validation weaknesses concerning X.509 Key Usage · Issue #60 · ralphje/signify · GitHub

https://github.com/ralphje/signify/issues/60
generic

Add keyUsage digitalSignature validation for signer certificate by olszomal · Pull Request #477 · mtrojnar/osslsigncode · GitHub

https://github.com/mtrojnar/osslsigncode/pull/477
generic

bug: Validation weaknesses concerning X.509 Key Usage · Issue #475 · mtrojnar/osslsigncode · GitHub

https://github.com/mtrojnar/osslsigncode/issues/475

Vendor Advisories for CVE-2025-70888(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 45× 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 135 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 01:59 UTCEPSS rescore
  5. 2026-07-13 06:12 UTCEPSS rescore
  6. 2026-07-12 05:46 UTCEPSS rescore
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  8. 2026-07-11 08:27 UTCEPSS rescore
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  10. 2026-07-09 19:10 UTCEPSS rescore
  11. 2026-07-08 15:15 UTCEPSS rescore
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-06 16:27 UTCEPSS rescore
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-05 02:30 UTCEPSS rescore
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  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-04 06:31 UTCEPSS rescore
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-29 14:06 UTCEPSS rescore
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  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 14:07 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
  5. 2026-06-25 13:49 UTCEPSS rescore
  6. 2026-06-24 14:05 UTCEPSS rescore
  7. 2026-06-24 14:04 UTCEPSS rescore
  8. 2026-06-23 21:32 UTCEPSS rescore
  9. 2026-06-22 14:25 UTCEPSS rescore
  10. 2026-06-22 14:25 UTCEPSS rescore
  11. 2026-06-21 14:56 UTCEPSS rescore
  12. 2026-06-21 14:56 UTCEPSS rescore
  13. 2026-06-21 01:59 UTCEPSS rescore
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  15. 2026-06-19 19:25 UTCEPSS rescore
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  17. 2026-06-18 17:52 UTCEPSS rescore
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  19. 2026-06-17 17:53 UTCEPSS rescore
  20. 2026-06-16 17:52 UTCEPSS rescore
  21. 2026-06-15 17:48 UTCEPSS rescore
  22. 2026-06-14 23:18 UTCEPSS rescore
  23. 2026-06-13 23:00 UTCEPSS rescore
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-12 23:12 UTCEPSS rescore
  26. 2026-06-12 23:12 UTCEPSS rescore
  27. 2026-06-12 03:17 UTCEG score recompute
  28. 2026-06-12 03:17 UTCGHSA enrichment
  29. 2026-06-11 23:24 UTCEG score recompute
  30. 2026-06-11 23:24 UTCGHSA enrichment
  31. 2026-06-11 14:00 UTCEPSS rescore
  32. 2026-06-10 22:39 UTCEG score recompute
  33. 2026-06-10 22:39 UTCGHSA enrichment
  34. 2026-06-10 22:18 UTCEPSS rescore
  35. 2026-06-10 18:43 UTCEG score recompute
  36. 2026-06-10 18:43 UTCGHSA enrichment
  37. 2026-06-10 14:50 UTCEG score recompute
  38. 2026-06-10 14:50 UTCGHSA enrichment
  39. 2026-06-10 13:22 UTCEPSS rescore
  40. 2026-06-10 09:23 UTCEG score recompute
  41. 2026-06-10 09:23 UTCGHSA enrichment
  42. 2026-06-10 05:31 UTCEG score recompute
  43. 2026-06-10 05:31 UTCGHSA enrichment
  44. 2026-06-10 01:38 UTCEG score recompute
  45. 2026-06-10 01:38 UTCGHSA enrichment
  46. 2026-06-09 19:31 UTCEG score recompute
  47. 2026-06-09 19:31 UTCGHSA enrichment
  48. 2026-06-09 15:38 UTCEG score recompute
  49. 2026-06-09 15:38 UTCGHSA enrichment
  50. 2026-06-08 14:17 UTCEPSS rescore
  51. 2026-06-08 14:17 UTCEPSS rescore
  52. 2026-06-08 13:29 UTCEG score recompute
  53. 2026-06-08 13:29 UTCGHSA enrichment
  54. 2026-06-08 08:42 UTCEG score recompute
  55. 2026-06-08 08:42 UTCGHSA enrichment
  56. 2026-06-08 04:47 UTCEG score recompute
  57. 2026-06-08 04:47 UTCGHSA enrichment
  58. 2026-06-08 00:55 UTCEG score recompute
  59. 2026-06-08 00:55 UTCGHSA enrichment
  60. 2026-06-07 19:59 UTCEG score recompute
  61. 2026-06-07 19:59 UTCGHSA enrichment
  62. 2026-06-07 16:05 UTCEG score recompute
  63. 2026-06-07 16:05 UTCGHSA enrichment
  64. 2026-06-07 15:24 UTCEPSS rescore
  65. 2026-06-07 15:24 UTCEPSS rescore
  66. 2026-06-07 12:07 UTCEG score recompute
  67. 2026-06-07 12:07 UTCGHSA enrichment
  68. 2026-06-06 13:47 UTCEPSS rescore
  69. 2026-06-06 13:47 UTCEPSS rescore
  70. 2026-06-05 22:47 UTCEPSS rescore
  71. 2026-06-05 22:46 UTCEPSS rescore
  72. 2026-06-05 06:10 UTCEPSS rescore
  73. 2026-06-05 06:10 UTCEPSS rescore
  74. 2026-06-04 13:12 UTCEPSS rescore
  75. 2026-06-04 13:12 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-70888?
CVE-2025-70888 is a critical vulnerability published on March 25, 2026. An issue in mtrojnar Osslsigncode affected at v2.10 and before allows a remote attacker to escalate privileges via the osslsigncode.c component
When was CVE-2025-70888 disclosed?
CVE-2025-70888 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on April 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-70888 actively exploited?
CVE-2025-70888 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-70888?
CVE-2025-70888 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-70888?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-70888, 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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