Is CVE-2026-19814 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-19814?

CVE-2026-19814 has a CVSS v3 severity of HIGH (8.8).

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CVE-2026-19814

Description

A vulnerability was detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected is the function setMacQos of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Performing a manipulation of the argument macAddress results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used.