What’s Vulnerable › Vulnerabilities

CVE-2026-19814: TOTOLINK A800R firewall.so cstecgi.cgi setMacQos stack-based overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-14 · updated 2026-08-14
• Weakness: CWE-119

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.

Affected products

• TOTOLINK A800R: 4.1.2cu.5137_B20200730

References

• https://github.com/panda666-888/vuls/blob/main/totolink/a800r/setMacQos.md
• https://vuldb.com/cve/CVE-2026-19814
• https://vuldb.com/submit/869431
• https://vuldb.com/vuln/389950
• https://vuldb.com/vuln/389950/cti
• https://www.totolink.net/

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