Critical severity · published Apr 29, 2026
CVE-2026-41940
WebPros cPanel and WHM Authentication Bypass via Login Flow
RansomwareIn wildKEV
9.8
CVSS
98.5%
EPSS
Yes
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)98.5% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Apr 30, 2026
Federal remediation dueMay 3, 2026
Ransomware campaign useKnown
Affected products
Which versions
WH
WHM · WebPros
11.40.0.0 before 11.86.0.41; 11.88.0.0 before 11.94.0.28; 11.96.0.0 before 11.102.0.39; 11.104.0.0 before 11.110.0.97; 11.112.0.0 before 11.118.0.63; 11.120.0.0 before 11.124.0.35; +5 more · source: vendor, NVD
WS
WP Squared · WebPros
before 11.136.1.7 · source: vendor, NVD
CP
cPanel · WebPros
11.40.0.0 before 11.86.0.41; 11.88.0.0 before 11.94.0.28; 11.96.0.0 before 11.102.0.39; 11.104.0.0 before 11.110.0.97; 11.112.0.0 before 11.118.0.63; 11.120.0.0 before 11.124.0.35; +5 more · source: vendor, NVD
CW
cPanel & WHM and WP2 (WordPress Squared) · WebPros
All versions, or not specified · source: KEV
In the news
VulnerabilityCritical
SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 97
Security Affairs Malware newsletter includes a collection of the best articles and research on malware in the international landscape Malware Newsletter JDownloader site hacked to replace installers with Python RAT malware     New TrickMo Variant: Device Take Over malware targeting Banking, Fintech, Wallet & Auth apps   Threat Actor Mr_Rot13 Actively Exploits CVE-2026-41940 for Backdoor Deployment   Operation […]
May 17, 2026·Security Affairs
VulnerabilityCritical
U.S. CISA adds a flaw in WebPros cPanel to its Known Exploited Vulnerabilities catalog
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in WebPros cPanel to its Known Exploited Vulnerabilities catalog The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a flaw in Microsoft Defender, tracked as CVE-2026-41940 (CVSS score of 9.3), to its Known Exploited Vulnerabilities (KEV) catalog. cPanel is a widely used web hosting control panel that lets […]
May 3, 2026·Security Affairs
VulnerabilityCritical
Federal agencies must patch cPanel bug by Sunday, CISA says
Incident responders at Rapid7 said successful exploitation of CVE-2026-41940 “grants an attacker control over the cPanel host system, its configurations and databases, and websites it manages.”
May 1, 2026·The Record
VulnerabilityHigh
[CISA KEV] CVE-2026-41940: WebPros cPanel & WHM and WP2 (WordPress Squared) - WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
WebPros cPanel & WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
CWcPanel & WHM and WP2 (WordPress Squared)CVE-2026-41940
Apr 30, 2026·CISA KEV
Affected product
CP
cPanel
WebPros
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