CVE-2026-67399

CriticalCVSS 9.3/10Last modified Sep 18, 2026

Description

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.

Metrics

CVSS 4.0 9.3/10CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weakness enumeration

CWE-502

Affected software

VendorProductVersions
WebProsWHMCS>= 9.0.0, < 9.0.8; >= 8.0.0, < 8.13.7

References

Timeline

Published
Sep 14, 2026
Last modified
Sep 18, 2026
NVD status
Deferred

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CVE-2026-67399: Critical severity, CVSS 9.3 | Vulnix