Ubiquiti has released fixes for 25 vulnerabilities across its UniFi ecosystem, including several critical flaws that let a network-based attacker fully compromise devices. The most severe, CVE-2026-50746 rated 10.0, is an improper access-control bug in the UniFi Connect application that allows unauthenticated command injection on the host. Others rated 9.9, spanning UniFi Talk, Access, Protect, and UniFi OS, include SQL injection, command injection, and server-side request forgery that lead to privilege escalation, and some can be chained to bypass authentication requirements. The flaws affect widely deployed gateways and consoles like the UDM family. Ubiquiti lists no interim workarounds, so updating each affected product to its fixed version is the only mitigation.
Researchers at Bishop Fox have shown that three maximum-severity flaws Ubiquiti patched in May can be chained into a single attack that hands an unauthenticated attacker root access to UniFi OS Server with one crafted web request. Two flaws (CVE-2026-34908 and CVE-2026-34909) bypass the login gateway by abusing how the server reads encoded web addresses; the third (CVE-2026-34910) injects commands into the package-update feature, which runs with passwordless sudo, making escalation to root trivial. The flaws hit version 5.0.6 and earlier across widely used gear like UDM, UCG, and UNVR appliances. Bishop Fox released a free script to check for exposure.
Ubiquiti has shipped patches for five UniFi OS vulnerabilities, three of which are CVSS-maximum and exploitable by remote unauthenticated attackers. CVE-2026-34908 is an improper access control that lets attackers make unauthorized changes; CVE-2026-34909 is a path traversal that reaches an underlying system account; CVE-2026-34910 is an unauthenticated command injection. Two additional flaws (CVE-2026-33000, a critical command injection, and CVE-2026-34911, a high-severity info disclosure) were also patched. All five came through Ubiquiti's HackerOne program. Censys is tracking close to 100,000 internet-exposed UniFi OS endpoints, around 50,000 of them in the US. Ubiquiti products were previously hijacked into the GRU-operated Moobot botnet.
TrustStrike Labs