What’s Vulnerable › Vulnerabilities

CVE-2026-7750: Totolink N300RH POST Request cstecgi.cgi setMacFilterRules buffer overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-04 · updated 2026-10-26
• Weakness: CWE-119

Description

A vulnerability was detected in Totolink N300RH 3.2.4-B20220812. This vulnerability affects the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument mac_address results in buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

Affected products

• Totolink N300RH: 3.2.4-B20220812

References

• https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setMacFilterRules-34553a41781f809cb952cdcb71ce90d8
• https://vuldb.com/submit/807204
• https://vuldb.com/vuln/360925
• https://vuldb.com/vuln/360925/cti
• https://www.totolink.net/

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