What’s Vulnerable › Vulnerabilities

CVE-2026-7748: Totolink N300RH POST Request cstecgi.cgi setUpgradeFW 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 weakness has been identified in Totolink N300RH 3.2.4-B20220812. Affected by this issue is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Executing a manipulation of the argument FileName can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

• Totolink N300RH: 3.2.4-B20220812

References

• https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setUpgradeFW-34553a41781f80abb1d1c627d7ff4329?pvs=73
• https://vuldb.com/submit/807202
• https://vuldb.com/vuln/360923
• https://vuldb.com/vuln/360923/cti
• https://www.totolink.net/

Get alerted when CVE-2026-7748 or the next vulnerability affects your stack