CVE-2026-41940 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-41940CRITICAL

WebPros cPanel and WHM Authentication Bypass via Login Flow

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .9793   99.9   YES

AFFECTED
  Product     Versions     Fixed
  cPanel      11.40.0.0 –  —
  WP Squared  unspecified  11.136.1.7
  WHM         11.40.0.0 –  —

TIMELINE
  Apr 22  Reserved by VulnCheck
  Apr 30  Added to CISA KEV, remediation due 2026-05-03
  Apr 30  Published (CNA: VulnCheck)
  Aug 3   EXPLOIT PUBLISHED — CVE-2026-41940 (WebPros cPanel). Public exploit reference added.
  Aug 3   PATCH SHIPPED — CVE-2026-41940 (WebPros cPanel). Fixed in WP Squared 11.136.1.7.

CWE-306 · CNA: VulnCheck · CVSS v4.0 · 9 references · KEV due May 3, 2026

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.

Lifecycle

Complete event history — 5 events, chronological
Date	Event	Detail
April 22, 2026	Reserved	Reserved by VulnCheck
April 30, 2026	KEV ADDED	Added to CISA KEV, remediation due 2026-05-03
April 30, 2026	Published	Published (CNA: VulnCheck)
August 3, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-41940 (WebPros cPanel). Public exploit reference added.
August 3, 2026	PATCH SHIPPED	PATCH SHIPPED — CVE-2026-41940 (WebPros cPanel). Fixed in WP Squared 11.136.1.7.

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
WebPros	cPanel	—	11.40.0.0	—
WebPros	WP Squared	—	—	11.136.1.7
WebPros	WHM	—	11.40.0.0	—

Weaknesses

CWE-306

References (9)

https://docs.cpanel.net/release-notes/release-notes [release-notes]
https://docs.wpsquared.com/changelogs/versions/changelog/#13617 [release-notes]
https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py [exploit]
https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/
https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 [vendor-advisory, patch]
https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940 [government-resource]
https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026 [third-party-advisory]
https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow [third-party-advisory]

Authoritative record: CVE-2026-41940 at cve.org

Vendors: webpros

Weaknesses: CWE-306

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-41940 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.