CVE-2021-44246: Totolink a3100r Firmware

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

Totolink devices A3100R v4.1.2cu.5050_B20200504, A830R v5.9c.4729_B20191112, and A720R v4.1.5cu.470_B20200911 were discovered to contain a stack overflow in the function setNoticeCfg. This vulnerability allows attackers to cause a Denial of Service (DoS) via the IpTo parameter.

Affected products

• Totolink a3100r Firmware: version 4.1.2cu.5050_b20200504 only
• Totolink a720r Firmware: version 4.1.5cu.470_b20200911 only
• Totolink a830r Firmware: version 5.9c.4729_b20191112 only

Published 2022-02-04. Last modified 2026-06-17.