Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2026-41940

WebPros cPanel and WHM Authentication Bypass

WebPros / cPanel · affected before 11.86.0.41

Watch CVE-2026-41940 Browse KEV feed
Severity
CVSS 9.3 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
98.5%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-41940 is an unauthenticated vulnerability affecting WebPros cPanel and 2 other products. cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

WebPros / cPanel affected before 11.86.0.41.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

WebPros cPanel and WHM Authentication Bypass

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.

WebPros Affected
cPanel
Before 11.86.0.41 Before 11.94.0.28 Before 11.102.0.39 Before 11.110.0.97 Before 11.118.0.63 Before 11.124.0.35 Before 11.126.0.54 Before 11.130.0.19 Before 11.132.0.29 Before 11.134.0.20 Before 11.136.0.5
WebPros Affected
WP Squared
Before 11.136.1.7
WebPros Affected
WHM
Before 11.86.0.41 Before 11.94.0.28 Before 11.102.0.39 Before 11.110.0.97 Before 11.118.0.63 Before 11.124.0.35 Before 11.126.0.54 Before 11.130.0.19 Before 11.132.0.29 Before 11.134.0.20 Before 11.136.0.5
View vendor advisory (opens in new tab)
Published
29 Apr 2026
Exploitation Reported
01 Jun 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

nuclei_scanner cisa malware

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 01 Jun 2026

A trusted third party reported exploitation.

Used in malware

CVE

Recorded 02 Jun 2026

Malware families have been linked to exploitation of this CVE.

Proof of concept available

GitHub

Recorded 05 May 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
The Shadowserver First 2026-06-01 00:00 UTC
CVE 2026-06-01 13:26 UTC
CISA 2026-06-02 14:01 UTC
Daily CyberSecurity 2026-06-08 13:20 UTC
Tenable Blog 2026-07-20 13:36 UTC
The Hacker News 2026-10-23 18:32 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-41940.yaml 01 Jun 2026

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

9.3 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

98.5%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Missing Authentication for Critical Function CWE-306

Recent mention · The Hacker News

Exposed Infrastructure Reveals How Ransomware Affiliates Used AI Agents to Execute Intrusions

Ravie LakshmananOct 23, 2026Ransomware / Cybercrime Cybersecurity researchers have discovered an artificial intelligence (AI)-driven intrusion ecosystem run by affiliates of the INC and The Gentlemen ransomware groups. Central to the operation is an "Autonomous Red Team Kill...

Read full advisory

All CVSS Scores

CVSS v4.0 9.3 Critical

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

CVSS v3.1 9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

All Mentions

Recent mention · The Hacker News

Exposed Infrastructure Reveals How Ransomware Affiliates Used AI Agents to Execute Intrusions

The Hacker News · 23 Oct 2026

Ravie LakshmananOct 23, 2026Ransomware / Cybercrime Cybersecurity researchers have discovered an artificial intelligence (AI)-driven intrusion ecosystem run by affiliates of the INC and The Gentlemen ransomware groups. Central to the operation is an "Autonomous Red Team Kill Chain Framework" referred to as Phantom. The threat actor is assessed to be Russian-speaking and functions both as an intrusion and data-extortion operator, as well as an infrastructure provider supporting different partners across the ransomware ecosystem. "The operators exploited edge and remote-access systems at...

Recent mention · SOCRadar

INC and The Gentlemen Ransomware: Exposed AI Infrastructure

SOCRadar · 20 Oct 2026

SOCRadar Threat Research Unit (STRU) has uncovered an AI-driven intrusion ecosystem run by affiliates of the INC Ransomware and The Gentlemen Ransomware groups. A single publicly accessible command-and-control server exposed the operators’ AI session databases, their central knowledge base and the source code of Phantom, a new “Autonomous Red Team Kill Chain Framework”. Configuration files, […]

Recent mention · Tenable Blog

wp2shell (CVE-2026-63030, CVE-2026-60137): Frequently asked questions about remote code execution chain in WordPress Core

Tenable Blog · 20 Jul 2026

An unauthenticated attacker can chain two WordPress Core vulnerabilities, CVE-2026-63030 and CVE-2026-60137, to achieve remote code execution against affected WordPress installations. Multiple security firms have confirmed active in-the-wild exploitation within days of public disclosure, and public proof-of-concept exploits are circulating.Key takeaways:Two WordPress Core vulnerabilities, CVE-2026-63030 and CVE-2026-60137, can be chained together to achieve pre-authentication remote code execution against WordPress 6.9.x and 7.0.x installations. Multiple security firms have confirmed...

Recent mention · Daily CyberSecurity

Check Point VPN Vulnerability Exploited in the Wild with Ransomware Links

Daily CyberSecurity · 08 Jun 2026

Critical Authentication Bypass Threatens Remote Access Deployments A serious security warning has been issued for corporate virtual private The post Check Point VPN Vulnerability Exploited in the Wild with Ransomware Links appeared first on Daily CyberSecurity. Related posts: Critical Warning: QNAP Patches Seven Zero-Days Exploited at Pwn2Own 2025 Critical Triofox Zero-Day (CVE-2025-12480) Under Active Exploit: Host Header Bypass Allows Unauthenticated Admin Takeover Exploited in the Wild: PoC Released for cPanel CVE-2026-41940 Authentication Bypass Zero-Day

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

sakidekin/CVE-2026-41940-PoC

github · Created 2026-10-11 07:54:18 UTC · 0 stars · AI assessment 90%

cPanel & WHM Authentication Bypass via CVE-2026-41940 explotation

0xgh057r3c0n/CVE-2026-41940

github · Created 2026-09-05 11:19:21 UTC · 1 stars · AI assessment 90%

cPanel & WHM - Authentication Bypass via Session-File CRLF Injection

t4xo/CVE-2026-41940

github · Created 2026-08-22 10:48:01 UTC · 0 stars · AI assessment 90%

ts zeroday exp made by nullsec white team

yanchenyu360/CVE-2026-41940-Security-Patch

github · Created 2026-08-13 04:55:41 UTC · 0 stars · AI assessment 85%

针对CVE-2026-41940漏洞的临时缓解措施

ZildanZ/CVE-2026-41940

github · Created 2026-05-05 05:58:09 UTC · 0 stars · AI assessment 90%

CVE Record exploit — github.com

cve · Created Unknown

cPanel & WHM - Authentication Bypass via Session-File CRLF Injection

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 18:32 UTC

    KEV confirmed by The Hacker News

    Exploitation attested by an external source

  2. 13:36 UTC

    KEV confirmed by Tenable Blog

    Exploitation attested by an external source

  3. 13:20 UTC

    KEV confirmed by Daily CyberSecurity

    Exploitation attested by an external source

  4. 14:01 UTC

    First public exploitation report

    Exploit observed in malware

  5. 14:01 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  6. 15:34 UTC

    Nuclei template available

    Scanner coverage available

  7. 13:26 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  8. 00:00 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  9. 05:58 UTC

    Public PoC available

    Public proof-of-concept code published

  10. 15:10 UTC

    CVE published

    Vulnerability disclosed publicly

  11. 18:50 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-41940

Sample API response 
{
  "cve_id": "CVE-2026-41940",
  "confidence": "Confirmed",
  "cvss_score": 9.3,
  "cvss_estimated": false,
  "epss_score": 0.98527,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}