How severe is CVE-2026-22454?

CVE-2026-22454 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-2026-22454 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-22454?

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-2026-22454 have an EU (EUVD) identifier?

Yes. CVE-2026-22454 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9575.

When was CVE-2026-22454 published?

CVE-2026-22454 was published on 2026-03-05 and last updated on 2026-06-17.

CVE-2026-22454

CVE-2026-22454 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: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9575
Weakness: CWE-502
Published: 2026-03-05
Last modified: 2026-06-17

Description

Deserialization of Untrusted Data vulnerability in ThemeREX Solaris solaris allows Object Injection.This issue affects Solaris: from n/a through <= 2.5.

Frequently asked questions

What is CVE-2026-22454?: Deserialization of Untrusted Data vulnerability in ThemeREX Solaris solaris allows Object Injection.This issue affects Solaris: from n/a through <= 2.5.
How severe is CVE-2026-22454?: CVE-2026-22454 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-2026-22454 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-22454?: 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-2026-22454 have an EU (EUVD) identifier?: Yes. CVE-2026-22454 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9575.
When was CVE-2026-22454 published?: CVE-2026-22454 was published on 2026-03-05 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Theme/solaris/vulnerability/wordpress-solaris-theme-2-5-php-object-injection-vulnerability?_s_id=cve

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