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NVD Vulnerability Details :
CVE-2026-41940
Analyzed
More InfoOfficial Page
Source-disclosure@vulncheck.com
View Known Exploited Vulnerability (KEV) details
Published At-29 Apr, 2026 | 16:16
Updated At-04 May, 2026 | 18:09

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
2026-04-302026-05-03WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function VulnerabilityApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Date Added: 2026-04-30
Due Date: 2026-05-03
Vulnerability Name: WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
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.
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.09.3CRITICAL
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
Secondary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 9.3
Base severity: CRITICAL
Vector:
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
Type: Secondary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches

cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 11.40(inclusive) to 86.0.41(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 88.0.0(inclusive) to 110.0.97(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 112.0.0(inclusive) to 118.0.63(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 120.0.0(inclusive) to 124.0.35(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 126.0.1(inclusive) to 126.0.54(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 128.0.0(inclusive) to 130.0.19(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 132.0.0(inclusive) to 132.0.29(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 134.0.0(inclusive) to 134.0.20(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>cpanel>>Versions from 136.0.0(inclusive) to 136.0.5(exclusive)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 11.40(inclusive) to 86.0.41(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 88.0.0(inclusive) to 110.0.97(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 112.0.0(inclusive) to 118.0.63(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 120.0.0(inclusive) to 124.0.35(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 126.0.1(inclusive) to 126.0.54(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 128.0.0(inclusive) to 130.0.19(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 132.0.0(inclusive) to 132.0.29(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 134.0.0(inclusive) to 134.0.20(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>whm>>Versions from 136.0.0(inclusive) to 136.0.5(exclusive)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cPanel (WebPros International, LLC)
cpanel
>>wp_squared>>Versions before 136.1.7(exclusive)
cpe:2.3:a:cpanel:wp_squared:*:*:*:*:*:wordpress:*:*
Weaknesses
CWE IDTypeSource
CWE-306Secondarydisclosure@vulncheck.com
CWE ID: CWE-306
Type: Secondary
Source: disclosure@vulncheck.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://docs.cpanel.net/release-notes/release-notesdisclosure@vulncheck.com
Release Notes
https://docs.wpsquared.com/changelogs/versions/changelog/#13617disclosure@vulncheck.com
Release Notes
https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026disclosure@vulncheck.com
Vendor Advisory
https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026disclosure@vulncheck.com
Third Party Advisory
https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flowdisclosure@vulncheck.com
Third Party Advisory
https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/af854a3a-2127-422b-91ae-364da2661108
Exploit
Third Party Advisory
https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/af854a3a-2127-422b-91ae-364da2661108
Press/Media Coverage
https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource
Hyperlink: https://docs.cpanel.net/release-notes/release-notes
Source: disclosure@vulncheck.com
Resource:
Release Notes
Hyperlink: https://docs.wpsquared.com/changelogs/versions/changelog/#13617
Source: disclosure@vulncheck.com
Resource:
Release Notes
Hyperlink: https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026
Source: disclosure@vulncheck.com
Resource:
Vendor Advisory
Hyperlink: https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory
Hyperlink: https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory
Hyperlink: https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Exploit
Third Party Advisory
Hyperlink: https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Press/Media Coverage
Hyperlink: https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Third Party Advisory
Hyperlink: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
US Government Resource
Change History
0Changes found

Details not found