What is CVE-2026-27084?

CVE-2026-27084 is a critical-severity vulnerability in Themerex Buisson, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-25.

How severe is CVE-2026-27084?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Themerex Buisson

CVE-2026-27084

Deserialization of Untrusted Data vulnerability in ThemeREX Buisson buisson allows Object Injection.This issue affects Buisson: from n/a through <= 1.1.11.

Vulnerability class: Insecure Deserialization

EPSS: 0.000 (6.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Themerex Buisson — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

patchstack.com/database/Wordpress/Theme/buisson/vulnerability/wordpress-buisson… (vdb-entry)

Frequently asked questions

What is CVE-2026-27084?: CVE-2026-27084 is a critical-severity vulnerability in Themerex Buisson, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-25.
How severe is CVE-2026-27084?: Critical severity. CVSS v3 base score is 9.8 out of 10.