CVE-2026-19813
High
Description
A security vulnerability has been detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Such manipulation of the argument Comment leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.
SeverityHigh
CVSS8.8
Exploit probability—
ProductTotolink A800r Firmware
PublishedAug 14, 2026
First seenAug 14, 2026
Weakness typeCWE-121CWE-121CWE-119Memory buffer bounds error
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| totolink a800r_firmware | 4.1.2cu.5137_B20200730 | — |
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