CVE-2026-41940
CriticalExploitedPublic exploitcPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
Published Apr 30, 2026 · Updated Sep 30, 2026 · Also known as TR-26-0140
Key Facts
Patch immediately- CVE-2026-41940 is a critical-severity vulnerability (CVSS 9.3 v4) affecting cPanel, WHM (Cpanel), WP Squared (Cpanel).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 28, 2026 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 99% probability of exploitation in the next 30 days.
- Fixed versions are available, including cPanel 11.102.0.39, cPanel 11.110.0.97, cPanel 11.118.0.63.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (30-day exploit likelihood)
99%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-41940 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Apr 30, 2026 | May 3, 2026 | Known |
| Industry KEV feed | Apr 28, 2026 | May 3, 2026 | Known |
| CIRCL KEV | Apr 30, 2026 | May 3, 2026 | Not reported |
| ENISA EUVD | Apr 30, 2026 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
7 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| cPanelCpanel | >= 11.40.0.0 | 86.0.41 |
| WHMCpanel | >= 11.40.0.0 | 86.0.41 |
| WP SquaredCpanel | See advisory | 136.1.7 |
Patched Releases
cPanel
11.102.0.39, 11.110.0.97, 11.118.0.63, 11.124.0.35, 11.126.0.54, 11.130.0.19, 11.132.0.29, 11.134.0.20, 11.136.0.5, 11.86.0.41, 11.94.0.28, 110.0.97, 118.0.63, 124.0.35, 126.0.54, 130.0.19, 132.0.29, 134.0.20, 136.0.5, 86.0.41
WHM
11.102.0.39, 11.110.0.97, 11.118.0.63, 11.124.0.35, 11.126.0.54, 11.130.0.18, 11.130.0.19, 11.132.0.29, 11.86.0.41, 11.94.0.28, 110.0.97, 118.0.63, 124.0.35, 126.0.54, 130.0.19, 132.0.29, 134.0.20, 136.0.5, 86.0.41, 11.134.0.20, 11.136.0.5
WP Squared
136.1.7, 11.136.1.7
Timeline
Added to Industry KEV feed
Apr 28, 2026
Publicly disclosed
Apr 30, 2026
Added to CISA KEV
Apr 30, 2026
Added to CIRCL KEV
Apr 30, 2026
Added to ENISA EUVD
Apr 30, 2026
Last updated
Sep 30, 2026
Weakness Type
- CWE-306 Missing Authentication for Critical Function
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-41940
- advisoryhttps://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026
- advisoryhttps://support.cpanel.net/hc/en-us/articles/40073787579671-Security-CVE-2026-41940-cPanel-WHM-WP2-Security-Update-04-28-2026
- advisoryhttps://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026
- advisoryUSOM advisory
FAQ
Common Questions.
cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
Affected: cPanel versions >= 11.40.0.0; WHM (Cpanel) versions >= 11.40.0.0; WP Squared (Cpanel). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 28, 2026 and is known to be used in ransomware campaigns.
Yes. It was added on Apr 30, 2026 with a federal remediation due date of May 3, 2026.
Public exploit code is available.
Fixed versions are available, including cPanel 11.102.0.39, cPanel 11.110.0.97, cPanel 11.118.0.63.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-41940 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo