CVE-2025-51677

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

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

An issue was discovered in openRISC OR1200 commit 83ac6b. An output mismatch between the RTL and the netlist of the or1200 cpu output port can lead to unexpected behavior.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
35.3%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 20, 2026

Advisory Details (3)

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

SynFuzz CVE

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

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

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

Synthesis Bugs in the LSU · Issue #160 · openrisc/mor1kx · GitHub

https://github.com/openrisc/mor1kx/issues/160#issuecomment-2585618940

Vendor Advisories for CVE-2025-51677(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 19× in last 7d / 19× 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. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 02:58 UTCEG score recompute
  3. 2026-07-23 00:23 UTCEG score recompute
  4. 2026-07-23 00:23 UTCGHSA enrichment
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-22 14:07 UTCEPSS rescore
  7. 2026-07-21 15:24 UTCEPSS rescore
  8. 2026-07-20 18:38 UTCEG score recompute▲ 9.10
  9. 2026-07-20 18:38 UTCGHSA enrichment
  10. 2026-07-20 18:37 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  11. 2026-07-20 17:08 UTCEPSS rescore
  12. 2026-07-19 14:30 UTCEPSS rescore
  13. 2026-07-19 14:30 UTCEPSS rescore
  14. 2026-07-19 02:30 UTCEG score recompute
  15. 2026-07-19 02:30 UTCGHSA enrichment
  16. 2026-07-19 02:28 UTCEPSS rescore
  17. 2026-07-17 22:01 UTCNVD update
  18. 2026-07-17 19:50 UTCEG score recompute
  19. 2026-07-17 19:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-51677?
CVE-2025-51677 is a critical vulnerability published on July 17, 2026. An issue was discovered in openRISC OR1200 commit 83ac6b. An output mismatch between the RTL and the netlist of the or1200 cpu output port can lead to unexpected behavior.
When was CVE-2025-51677 disclosed?
CVE-2025-51677 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-51677 actively exploited?
CVE-2025-51677 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-51677?
CVE-2025-51677 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-51677?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-51677, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2025-51677

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