What is CVE-2021-26266?

CVE-2021-26266 is a high-severity vulnerability in Cpanel. CVSS score: 7.5/10. Published 2021-01-26.

How severe is CVE-2021-26266?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cpanel

CVE-2021-26266

cPanel before 92.0.9 allows a Reseller to bypass the suspension lock (SEC-578).

Published 2021-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Cpanel

References

docs.cpanel.net/changelogs/92-change-log/ (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-26266?: CVE-2021-26266 is a high-severity vulnerability in Cpanel. CVSS score: 7.5/10. Published 2021-01-26.
How severe is CVE-2021-26266?: High severity. CVSS v3 base score is 7.5 out of 10.