What is CVE-2016-10840?

CVE-2016-10840 is a high-severity vulnerability in Cpanel, classified under Exposure of Resource to Wrong Sphere. CVSS score: 8.8/10. Published 2019-08-01.

How severe is CVE-2016-10840?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Cpanel

CVE-2016-10840

cPanel before 11.54.0.4 allows arbitrary code execution during locale duplication (SEC-72).

Published 2019-08-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (80.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

References

documentation.cpanel.net/display/CL/54+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2016-10840?: CVE-2016-10840 is a high-severity vulnerability in Cpanel, classified under Exposure of Resource to Wrong Sphere. CVSS score: 8.8/10. Published 2019-08-01.
How severe is CVE-2016-10840?: High severity. CVSS v3 base score is 8.8 out of 10.