What is CVE-2016-10820?

CVE-2016-10820 is a high-severity vulnerability in Cpanel, classified under Improper Access Control. CVSS score: 8.8/10. Published 2019-08-01.

How severe is CVE-2016-10820?

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

Vulnerability in Cpanel

CVE-2016-10820

cPanel before 55.9999.141 allows daemons to access their controlling TTYs (SEC-31).

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: 0.013 (69.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

documentation.cpanel.net/display/CL/56+Change+Log (Product, Release Notes)
forums.cpanel.net/threads/cpanel-tsr-2016-0002-full-disclosure.534481/ (Vendor Advisory)

Frequently asked questions

What is CVE-2016-10820?: CVE-2016-10820 is a high-severity vulnerability in Cpanel, classified under Improper Access Control. CVSS score: 8.8/10. Published 2019-08-01.
How severe is CVE-2016-10820?: High severity. CVSS v3 base score is 8.8 out of 10.