CVE-2021-32706
7.6 · HIGHOverview
CVE-2021-32706 is a high-severity vulnerability affecting pi-hole pi-hole. It was published on August 4, 2021 and has a CVSS 3.1 base score of 7.6 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.6, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
Pi-hole's Web interface provides a central location to manage a Pi-hole instance and review performance statistics. Prior to Pi-hole Web interface version 5.5.1, the `validDomainWildcard` preg_match filter allows a malicious character through that can be used to execute code, list directories, and overwrite sensitive files. The issue lies in the fact that one of the periods is not escaped, allowing any character to be used in its place. A patch for this vulnerability was released in version 5.5.1.
Remediation
Check the references section for vendor advisories and patches from pi-hole. Update pi-hole to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| pi-hole | pi-hole | >= 0, < 5.5.1 | Affected |
Frequently Asked Questions
What is CVE-2021-32706?
CVE-2021-32706 is a high-severity vulnerability affecting pi-hole pi-hole. It was published on August 4, 2021 and has a CVSS 3.1 base score of 7.6 (HIGH).
How severe is CVE-2021-32706?
This vulnerability has a CVSS 3.1 base score of 7.6, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-32706?
Check the references section for vendor advisories and patches from pi-hole. Update pi-hole to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-32706?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-32706 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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