--- title: "CVE-2026-41940: WebPros cPanel and WHM Authentication… | CubePath" description: "cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain…" language: en source: https://cubepath.com/security/cve/CVE-2026-41940 --- # CVE-2026-41940: WebPros cPanel and WHM Authentication… | CubePath ## 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. Official description from the CVE record, published by VulnCheck. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-41940) ## Key data ### CVSS 4.0 Critical 9.3 Score published by VulnCheck in the CVE record. 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 | Metric | Value | What it means | | ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. | | Attack requirements | None | The attack works without any special deployment or execution conditions. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. | | Vulnerable system: integrity | High | Serious or total effect on the trustworthiness of data. | | Vulnerable system: availability | High | Serious or total effect on availability. | | Subsequent systems: confidentiality | None | No effect on other systems' data secrecy. | | Subsequent systems: integrity | None | No effect on other systems' data trustworthiness. | | Subsequent systems: availability | None | No effect on other systems' availability. | ### CVSS 3.1 Critical 9.8 Score published by VulnCheck in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.98527 (98.5% probability) Percentile 99.9% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability Added to the catalog Apr 30, 2026 Federal due date May 3, 2026 Ransomware campaigns Known use ### CISA assessment as of Apr 29, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-306](https://cwe.mitre.org/data/definitions/306.html) Missing Authentication for Critical Functionality ## Affected products Products listed in the CVE record, as the CNA published them. - WebPros cPanel - affected: 11.40.0.0 up to before 11.86.0.41 - affected: 11.88.0.0 up to before 11.94.0.28 - affected: 11.96.0.0 up to before 11.102.0.39 - affected: 11.104.0.0 up to before 11.110.0.97 - affected: 11.112.0.0 up to before 11.118.0.63 - affected: 11.120.0.0 up to before 11.124.0.35 - affected: 11.126.0.0 up to before 11.126.0.54 - affected: 11.128.0.0 up to before 11.130.0.19 - affected: 11.132.0.0 up to before 11.132.0.29 - affected: 11.134.0.0 up to before 11.134.0.20 - affected: 11.136.0.0 up to before 11.136.0.5 - WebPros WP Squared - affected: before 11.136.1.7 - WebPros WHM - affected: 11.40.0.0 up to before 11.86.0.41 - affected: 11.88.0.0 up to before 11.94.0.28 - affected: 11.96.0.0 up to before 11.102.0.39 - affected: 11.104.0.0 up to before 11.110.0.97 - affected: 11.112.0.0 up to before 11.118.0.63 - affected: 11.120.0.0 up to before 11.124.0.35 - affected: 11.126.0.0 up to before 11.126.0.54 - affected: 11.128.0.0 up to before 11.130.0.19 - affected: 11.132.0.0 up to before 11.132.0.29 - affected: 11.134.0.0 up to before 11.134.0.20 - affected: 11.136.0.0 up to before 11.136.0.5 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-…](https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026) vendor-advisory patch - [docs.cpanel.net/release-notes/release-notes](https://docs.cpanel.net/release-notes/release-notes) release-notes - [docs.wpsquared.com/changelogs/versions/changelog](https://docs.wpsquared.com/changelogs/versions/changelog/#13617) release-notes - [namecheap.com/status-updates/ongoing-critical-security-vuln…](https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026) third-party-advisory - [vulncheck.com/advisories/cpanel-and-whm-authentication-bypa…](https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow) third-party-advisory - [bleepingcomputer.com/news/security/critrical-cpanel-flaw-ma…](https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/) - [labs.watchtowr.com/the-internet-is-falling-down-falling-dow…](https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/) ## Timeline 1. ID reserved Apr 22, 2026 2. Record published Apr 29, 2026 3. Added to CISA KEV Apr 30, 2026 4. Record last updated Sep 30, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:11 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)