cybersecurityubiquitivulnerabilitypatchingnetworking
Ubiquiti warns of new max severity UniFi OS vulnerability
July 7, 2026
Back to all postsUbiquiti, a leading manufacturer of networking products, has issued a warning about a new critical vulnerability affecting its UniFi OS software. The vulnerability, tracked as CVE-2021-40011, can potentially allow an unauthenticated attacker to execute arbitrary commands on affected devices. This breach could lead to data theft, system crashes, and even complete device takeover. The issue is particularly concerning for Canadian businesses that use Ubiquiti's solutions, as it exposes them to potential cyber threats. To mitigate the risk, Ubiquiti recommends immediate patching of all affected devices to the latest version of UniFi OS (6.4.35 or later). It is also crucial for IT managers to regularly monitor and update their network infrastructure.
Takeaway: If your business uses Ubiquiti's networking solutions, apply the latest updates to mitigate a critical vulnerability.
Source: BleepingComputer
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