CVE-2026-105475

Improper neutralization of a NUL byte in cPanel allows remote attackers to read any mail account's…

Risk score: 57/100
CVSS: 8.7 v4.0
Published: 2 Nov 2026

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What to know

What it is: Improper neutralization of a NUL byte in cPanel allows remote attackers to read any mail account's calendar and contact data.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 8.7 high
Remotely exploitable without logging in

References

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

Original description

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

Last activity 2 Nov 2026. Patch Forecast updates every hour.