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CVE-2026-33765

Pi-hole Web Interface command injection

9.8 CRITICALEPSS 1.77%
  1. Published27 Mar 2026

Description

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions prior to 6.0 have a critical OS Command Injection vulnerability in the savesettings.php file. The application takes the user-controlled $_POST['webtheme'] parameter and concatenates it directly into a system command executed via PHP's exec() function. Since the input is neither sanitized nor validated before being passed to the shell, an attacker can append arbitrary system commands to the intended pihole command. Furthermore, because the command is executed with sudo privileges, the injected commands will run with elevated (likely root) privileges. Version 6.0 patches the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Pi-hole Web Interface< 6.0

Remediation

Fixed in
Pi-hole Web Interface≥ 6.0

References

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Frequently asked

Is CVE-2026-33765 being actively exploited?

CVE-2026-33765 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.77%.

How severe is CVE-2026-33765?

CVE-2026-33765 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.77% probability of exploitation.

Which products are affected by CVE-2026-33765?

Affected products include Pi-hole Web Interface.

How do I fix CVE-2026-33765?

Upgrade affected software to a fixed version, for example Pi-hole Web Interface 6.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.