How severe is CVE-2025-51679?

CVE-2025-51679 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2025-51679 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-51679?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2025-51679 published?

CVE-2025-51679 was published on 2026-08-26 and last updated on 2026-09-09.

CVE-2025-51679

CVE-2025-51679 is a critical-severity vulnerability with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1281.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1281
Published: 2026-08-26
Last modified: 2026-09-09

Description

An issue was discovered in openRISC OR1200 commit 83ac6b. A mismatch between the RTL and netlist can lead to unexpected behavior.

Frequently asked questions

What is CVE-2025-51679?: An issue was discovered in openRISC OR1200 commit 83ac6b. A mismatch between the RTL and netlist can lead to unexpected behavior.
How severe is CVE-2025-51679?: CVE-2025-51679 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2025-51679 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-51679?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2025-51679 published?: CVE-2025-51679 was published on 2026-08-26 and last updated on 2026-09-09.

References

Other CWE-1281 vulnerabilities

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CVE-2025-22840 — High (CVSS 7.4): Sequence of processor instructions leads to unexpected behavior for some Intel(R) Xeon(R) 6 Scalable processors may…
CVE-2023-46103 — Medium (CVSS 4.7): Sequence of processor instructions leads to unexpected behavior in Intel(R) Core(TM) Ultra Processors may allow an…
CVE-2024-37020 — Low (CVSS 3.8): Sequence of processor instructions leads to unexpected behavior in the Intel(R) DSA V1.0 for some Intel(R) Xeon(R)…

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