Is CVE-2026-82539 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-82539?

CVE-2026-82539 has a CVSS v3 severity of CRITICAL (9.1).

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CVE-2026-82539

Description

A vulnerability was determined in TOTOLINK A720R 4.1.5cu.630_B20250509. This impacts the function setMacFilterRules of the file cstecgi.cgi of the component MAC Filtering. Executing a manipulation of the argument desc can lead to memory corruption. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.