---
id: CVE-2026-105475
title: >-
  Improper neutralization of a NUL byte in cPanel allows remote attackers to
  read any mail account's calendar and contact data.
summary: >-
  Improper neutralization of a NUL byte in cPanel allows remote attackers to
  read any mail account's calendar and contact data.
severity: high
cvss: 8.7
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-158
vendor: WebPros
product: cPanel
affected:
  - cPanel < 11.138.0.19
  - cPanel < 11.136.0.51
  - cPanel < 11.134.0.67
  - cPanel < 11.110.0.154
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-02T21:22:08.509417Z'
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T21:25:25.032Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105475'
references:
  - url: >-
      https://support.cpanel.net/hc/en-us/articles/44356591132439-Security-CVE-2026-105475-Unauthenticated-Access-to-Calendar-and-Contact-Data-in-cPanel-WHM-October-20th-2026
tags:
  - cve.org
epss: 0.00401
epssPercentile: 0.3456
ingestedAt: '2026-11-05T19:30:42.857Z'
---

## Overview

Improper neutralization of a NUL byte in cPanel allows remote attackers to read any mail account's calendar and contact data.

## Affected

- `cPanel < 11.138.0.19`
- `cPanel < 11.136.0.51`
- `cPanel < 11.134.0.67`
- `cPanel < 11.110.0.154`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.