How severe is CVE-2025-54520?

CVE-2025-54520 has a CVSS 4.0 base score of 8.6, rated high severity.

Is CVE-2025-54520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-54520?

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

Does CVE-2025-54520 have an EU (EUVD) identifier?

Yes. CVE-2025-54520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31074.

When was CVE-2025-54520 published?

CVE-2025-54520 was published on 2025-09-24 and last updated on 2026-06-17.

CVE-2025-54520

CVE-2025-54520 is a high-severity vulnerability with a CVSS 4.0 base score of 8.6. 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-1247.

Key facts

Severity: High (CVSS 4.0 base score 8.6)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31074
Weakness: CWE-1247
Published: 2025-09-24
Last modified: 2026-06-17

Description

Improper Protection Against Voltage and Clock Glitches in FPGA devices, could allow an attacker with physical access to undervolt the platform resulting in a loss of confidentiality.

Frequently asked questions

What is CVE-2025-54520?: Improper Protection Against Voltage and Clock Glitches in FPGA devices, could allow an attacker with physical access to undervolt the platform resulting in a loss of confidentiality.
How severe is CVE-2025-54520?: CVE-2025-54520 has a CVSS 4.0 base score of 8.6, rated high severity.
Is CVE-2025-54520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-54520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-54520 have an EU (EUVD) identifier?: Yes. CVE-2025-54520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31074.
When was CVE-2025-54520 published?: CVE-2025-54520 was published on 2025-09-24 and last updated on 2026-06-17.

References

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-8018.html

Other CWE-1247 vulnerabilities

CVE-2024-4760 — Medium (CVSS 6.3): A voltage glitch during the startup of EEFC NVM controllers on Microchip SAM E70/S70/V70/V71, SAM G55,…
CVE-2022-31224 — Low (CVSS 2.0): Dell BIOS versions contain an Improper Protection Against Voltage and Clock Glitches vulnerability. An attacker with…

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