CVE-2026-34909 Ubiquiti UniFi OS Path Traversal
A network-based attacker can exploit path traversal in UniFi OS to access system files and potentially take over accounts.
- Exploited in the wild
- Since 23 Jun 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34909?
CVE-2026-34909 is a critical path traversal vulnerability in Ubiquiti Inc EFG, published on 22 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.
Weakness: CWE-22
Which versions are affected by CVE-2026-34909?
It affects 32 products.
Products include Ui Enterprise Fortress Gateway Firmware, Ui Enterprise Network Video Recorder Core Firmware, Ui Enterprise Network Video Recorder Firmware, Ui Unas 2 Firmware, Ui Unas 4 Firmware, Ui Unas Pro 4 Firmware and 26 more.
How do I fix CVE-2026-34909?
No fix has been published for CVE-2026-34909 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 26 Jun 2026.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-34909 being exploited?
Yes. Attackers have exploited CVE-2026-34909 in the wild since at least 23 Jun 2026.
Other vulnerabilities in Ubiquiti Inc EFG
Sources
Also known as GHSA-95fp-244g-g3vr.