How severe is CVE-2025-56225?

CVE-2025-56225 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-56225 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56225?

CVE-2025-56225 affects Fluidsynth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56225?

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-2025-56225 have an EU (EUVD) identifier?

Yes. CVE-2025-56225 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1717.

When was CVE-2025-56225 published?

CVE-2025-56225 was published on 2026-01-09 and last updated on 2026-06-17.

CVE-2025-56225

CVE-2025-56225 is a high-severity vulnerability in Fluidsynth with a CVSS 3.x base score of 7.5. 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1717
Weakness: CWE-476
Affected product: Fluidsynth
Published: 2026-01-09
Last modified: 2026-06-17

Description

fluidsynth-2.4.6 and earlier versions is vulnerable to Null pointer dereference in fluid_synth_monopoly.c, that can be triggered when loading an invalid midi file.

Frequently asked questions

What is CVE-2025-56225?: fluidsynth-2.4.6 and earlier versions is vulnerable to Null pointer dereference in fluid_synth_monopoly.c, that can be triggered when loading an invalid midi file.
How severe is CVE-2025-56225?: CVE-2025-56225 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-56225 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56225?: CVE-2025-56225 affects Fluidsynth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56225?: 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-2025-56225 have an EU (EUVD) identifier?: Yes. CVE-2025-56225 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1717.
When was CVE-2025-56225 published?: CVE-2025-56225 was published on 2026-01-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fluidsynth:fluidsynth:*:*:*:*:*:*:*:*

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