Outage in Prostack
cPanel Zero Day - Restricted control panel access precaution
Resolved Minor
April 28, 2026 - Started 11 days ago
- Lasted about 13 hours
Incident Report
A cPanel Zero day authentication exploit has been found - out of an abundance of caution while cPanel work on a fix, we have taken action to protect systems from unauthenticated access to the affected area of the control panel.
This is an issue with cPanel itself, and not an issue with hosting or your websites.
This is tracked by cPanel themselves here: https://support.cpanel.net/hc/en-us/articles/40073787579671-Critical-Vulnerability-with-cPanel-WHM-Login-Authentication
Trusted by 1,000+ teams
Never miss outages in third-party dependencies
Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.
Latest Updates ( sorted recent to last )
MONITORING
11 days ago - at 04/28/2026 09:01PM
We have taken steps to limit access - as far as we can see, no compromise has taken place.
We will await cPanel's official update and fix to restore access to affected areas such as control panels and WHM.
IDENTIFIED
11 days ago - at 04/28/2026 08:43PM
A cPanel Zero day authentication exploit has been found - out of an abundance of caution while cPanel work on a fix, we have taken action to protect systems from unauthenticated access to the affected area of the control panel.
This is an issue with cPanel itself, and not an issue with hosting or your websites.
This is tracked by cPanel themselves here: https://support.cpanel.net/hc/en-us/articles/40073787579671-Critical-Vulnerability-with-cPanel-WHM-Login-Authentication
Latest Prostack outages
Linux vulnerability: "DirtyFrag" - about 22 hours ago
CVE-2026-31431 Copy Fail: Mitigation and Patches - 8 days ago
HV20 incident - about 2 months ago
HV05 downtime - 2 months ago
Never miss outages in third-party dependencies
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6320 services available
Integrations with
