CVE-2026-67399

9.3 criticalEPSS 0.8%

Critical (9.3). EPSS 0.8% chance of exploitation in the next 30 days.

Deserialization of untrusted data in WHMCS 9.0.0 before 9.0.8 and 8.0.0 before 8.13.7 allows remote attackers to execute arbitrary code.

Severity

9.3 critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
CWE: CWE-502
Published: 2026-09-14
Modified: 2026-09-18
Record from: the NVD, synced 2026-10-19