CVE-2026-33765Public exploitNetwork attack vector

Elevated command execution via unsanitized webtheme parameter

Published Mar 27, 2026 · Updated Mar 27, 2026

OS command injection in Pi-hole Web Interface before 6.0 allows remote attackers to execute commands with elevated privileges. The savesettings.php handler concatenates the POST webtheme value into a pihole command passed to PHP exec() without validation or shell escaping. No authentication or user interaction is required, and appended shell syntax executes through the sudo-enabled pihole wrapper with elevated privileges.

CVSS severity9.8
Critical
EPSS probability1.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Pi-hole Web Interface before 6.0 allows remote attackers to execute commands with elevated privileges. The savesettings.php handler concatenates the POST webtheme value into a pihole command passed to PHP exec() without validation or shell escaping. No authentication or user interaction is required, and appended shell syntax executes through the sudo-enabled pihole wrapper with elevated privileges.

The record

CVE
CVE-2026-33765
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
Pi-hole
Product
Pi-hole Web Interface
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pi-hole · Pi-hole Web Interfaceversion=< 6.0

Published CVSS scores

8.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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