Critical Ubiquiti Vulnerabilities in Attackers’ Crosshairs
Threat actors have been targeting three critical-severity vulnerabilities in Ubiquiti devices, the US cybersecurity agency CISA warns.
The exploited flaws, tracked as CVE-2026-34908, CVE-2026-34909, and CVE-2026-34910, with a CVSS score of 10/10, were patched last month.
CVE-2026-34908 is described as an improper access control issue that could allow remote attackers to make unauthorized changes to vulnerable UniFi OS devices.
CVE-2026-34909 is a path traversal defect that could be exploited to access files on the underlying operating system and manipulate them to access underlying accounts.
CVE-2026-34910 is described as an improper input validation weakness that allows attackers to execute command injection attacks over the network. A variant of the flaw, tracked as CVE-2026-33000 (CVSS score of 9.1), requires authentication.
On May 21, Ubiquiti announced that UniFi OS Server version 5.0.8 was released with patches for these vulnerabilities.
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The company made no mention of their in-the-wild exploitation,...
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