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CVE-2026-41940

99
FAUCET Score

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.

First published: Apr 29, 2026Last modified: May 6, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.40, < 86.0.41CPE matchmatch criteria
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
>= 88.0.0, < 110.0.97CPE matchmatch criteria
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
>= 112.0.0, < 118.0.63CPE matchmatch criteria
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
>= 120.0.0, < 124.0.35CPE matchmatch criteria
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
>= 126.0.1, < 126.0.54CPE matchmatch criteria
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

9.3CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
97.93%
Probability of exploitation in next 30 days
EPSS Percentile
99.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Apr 30, 2026
Metasploit: cPanel/WHM CRLF Injection Authentication Bypass RCE · Apr 28, 2026
Nuclei: CVE-2026-41940 · Apr 30, 2026
ExploitDB: EDB-52574 · May 26, 2026
This CVE's current EPSS score of 0.9793 is in the 99th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py
ExploitThird Party Advisory
cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
labs.watchtowr.com / the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940
ExploitThird Party Advisory
bleepingcomputer.com / news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks
Press/Media Coverage
docs.cpanel.net / release-notes/release-notes
Release Notes
docs.wpsquared.com / changelogs/versions/changelog
Release Notes
support.cpanel.net / hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026
Vendor Advisory
namecheap.com / status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026
Third Party Advisory
vulncheck.com / advisories/cpanel-and-whm-authentication-bypass-via-login-flow
Third Party Advisory