CVE-2025-51678

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

An issue was discovered in RISC-V PicoRV32 commit 87c89a. A mismatch in the PCPI INSN and memory address can lead to unexpected behavior.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jul 20, 2026
No patch confirmed yet.
generic

[2504.18812] SynFuzz: Leveraging Fuzzing of Netlist to Detect Synthesis Bugs

https://www.arxiv.org/abs/2504.18812
generic

SynFuzz CVE

https://mason.gmu.edu/~rsaravan/projects/synfuzz/cve/cve.html
generic

Synthesis Bug : Mismatch in PCPI INSN and Memory Address · Issue #269 · YosysHQ/picorv32 · GitHub

https://github.com/YosysHQ/picorv32/issues/269

Vendor Advisories for CVE-2025-51678(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 86× 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 180 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2025-51678?
CVE-2025-51678 is a high vulnerability published on July 17, 2026. An issue was discovered in RISC-V PicoRV32 commit 87c89a. A mismatch in the PCPI INSN and memory address can lead to unexpected behavior.
When was CVE-2025-51678 disclosed?
CVE-2025-51678 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-51678 actively exploited?
CVE-2025-51678 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.8% of all scored CVEs.
What is the CVSS score of CVE-2025-51678?
CVE-2025-51678 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-51678?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-51678, 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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