CVE Tools
Home/Vulnerability/CVE-2026-41940

CVE-2026-41940

WebPros cPanel and WHM Authentication Bypass via Login Flow

Published: Apr 29, 2026Updated: May 4, 2026 Sources: CVE List NVD
NVD MITRE
9.8CVSS
CRITICAL

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.

EPSS Score
90.3%
Top 0.4%
CISA KEV
Active Exploitation
Since Apr 30, 2026
Exploits
No Known Exploits
Remediation
Patch Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-306

Affected Products

cPanel
WebPros
WP Squared
WebPros
WHM
WebPros
cpanel
cpanel
whm
cpanel
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Apr 30, 2026
Remediation due:May 3, 2026
Ransomware:Known ransomware use

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.

Official Patch Available

Nuclei Scanner Templates

1 Nuclei template available for automated vulnerability detection.

Templates:1
  • Ready-to-use scanner templates
  • Verified detection rules
  • Direct integration with Nuclei
View Templates — Free

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026
support.cpanel.net
https://docs.cpanel.net/release-notes/release-notes
docs.cpanel.net
https://docs.wpsquared.com/changelogs/versions/changelog/#13617
docs.wpsquared.com
and 6 more references View all →

Timeline

Published
Apr 29, 2026
Added to CISA KEV
Apr 30, 2026
Last Updated
May 4, 2026
News mentions
3

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-41940 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
AI-powered analysis
Plain-language impact assessment and exploitation scenario
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows