How severe is CVE-2026-54194?

CVE-2026-54194 has a CVSS 3.x base score of 9.8, 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 high, and availability high.

Is CVE-2026-54194 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-54194?

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.

Does CVE-2026-54194 have an EU (EUVD) identifier?

Yes. CVE-2026-54194 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37509.

When was CVE-2026-54194 published?

CVE-2026-54194 was published on 2026-06-17.

CVE-2026-54194

CVE-2026-54194 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37509
Weakness: CWE-502
Published: 2026-06-17
Last modified: 2026-06-17

Description

Contributor PHP Object Injection in Fusion Builder <= 3.15.4 versions.

Frequently asked questions

What is CVE-2026-54194?: Contributor PHP Object Injection in Fusion Builder <= 3.15.4 versions.
How severe is CVE-2026-54194?: CVE-2026-54194 has a CVSS 3.x base score of 9.8, 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 high, and availability high.
Is CVE-2026-54194 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-54194?: 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.
Does CVE-2026-54194 have an EU (EUVD) identifier?: Yes. CVE-2026-54194 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37509.
When was CVE-2026-54194 published?: CVE-2026-54194 was published on 2026-06-17.

References

https://patchstack.com/database/wordpress/plugin/fusion-builder/vulnerability/wordpress-fusion-builder-plugin-3-15-4-php-object-injection-vulnerability?_s_id=cve

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