CVE-2026-22557
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceUniFi Network Application fails to properly sanitize file path inputs, allowing an attacker with network access to use directory traversal sequences (e.g., ../../../) to escape the intended directory and read or manipulate arbitrary files on the host system. This file access can be leveraged to obtain credentials or configuration data enabling account compromise.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Locate UniFi Network Application installationSearch for the UniFi application directory or identify the UniFi process running on the host system. On Linux common paths are /opt/UniFi or /usr/lib/unifi; on Windows check C:\ProgramData\UniFi or the installation directory.Affected if UniFi Network Application is installed on the system
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Identify the installed versionCheck the version file typically found in the installation directory (often named VERSION or version.properties) or access the web interface and view the login page footer which displays the version number.Affected if The installed version falls within the affected version range (compare your version against the vendor's advisory)
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Verify network accessibility of the management interfaceDetermine if the UniFi web interface (default ports 8080, 8443, or 443) is reachable from network segments outside your trusted administrative network. Review firewall rules and access control lists.Affected if The UniFi management interface is accessible from untrusted or external network locations
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Confirm the vulnerable endpoint is exposedCheck if file download or export features in the UniFi application are accessible via HTTP/HTTPS without additional authentication barriers beyond the standard login. Test network connectivity to the application ports.Affected if The application accepts file path parameters from network requests without sanitization filters in place
If the UniFi Network Application is network-accessible and the installed version is affected, the system is vulnerable to directory traversal attacks.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor patch immediately; if unavailable, restrict network access to the UniFi application to trusted IPs only and implement strict input validation on all file path parameters to block traversal sequences.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-22557 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-22557 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data