CVE-2026-82539: Totolink a720r

Critical severity, CVSS 9.1. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• Totolink a720r: version 4.1.5cu.630_B20250509 only

Published 2026-08-30. Last modified 2026-09-01.