UniFi Network Application - Path Traversal (CVE-2026-22557)
Description
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in the UniFi Network Application to access files on the underlying system that could be manipulated to access an underlying account.
psychologyCrowdSec Analysis
CVE-2026-22557 is a critical path traversal vulnerability in the UniFi Network Application by Ubiquiti Inc. This flaw allows remote attackers with network access to read arbitrary files on the underlying system, potentially leading to unauthorized account access and full system compromise. Attackers could leverage this vulnerability to manipulate sensitive files, escalate privileges, and disrupt network operations.
CrowdSec has been tracking this vulnerability and its exploits since 1st of July 2026.
CrowdSec network observations suggest that most exploitation of CVE-2026-22557 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. CrowdSec network telemetry also shows that exploitation of CVE-2026-22557 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.
Attackers exploit this vulnerability by sending requests to /guest/s/default/login with the page_error parameter containing encoded path traversal sequences (e.g., ..%2F..%2Fweb.xml) to access sensitive files on the UniFi Network Application server.
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| Event | Date |
|---|---|
| CVE Published | 2026-03-19 |
| Rule Released | 2026-07-01 |
| CrowdSec First Seen | 2026-07-02 |