CRITICAL 9.3 NVD

CVE-2026-67399

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.

References

https://help.whmcs.com/m/125386/l/2118034-cve-2026-67399-whmcs-security-update-2026-09-03

Published: 2026-09-14 · Source: NVD · Feed updated: 2026-09-15

This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-09-14 via NVD.

Risk Timeline

CVE Disclosed2026-09-14 · 0 days ago

Remediation Resources

Official Advisory

help.whmcs.com/m/125386/l/2118034-cve-2026-67399-whmcs-security-update

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