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

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
WebPros cPanel unaffected
Version Status Constraints
0 affected < 11.138.0.19
0 affected < 11.136.0.51
0 affected < 11.134.0.67
0 affected < 11.110.0.154

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
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 cve-icon cve-icon
History

Mon, 02 Nov 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 02 Nov 2026 21:15:00 +0000

Type Values Removed Values Added
Description Improper neutralization of a NUL byte in cPanel allows remote attackers to read any mail account's calendar and contact data.
Weaknesses CWE-158
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-11-02T21:25:25.032Z

Reserved: 2026-10-05T15:00:00.728Z

Link: CVE-2026-105475

cve-icon Vulnrichment

Updated: 2026-11-02T21:25:22.088Z

cve-icon NVD

Status : Received

Published: 2026-11-02T21:17:22.537

Modified: 2026-11-02T22:17:17.493

Link: CVE-2026-105475

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses