What’s Vulnerable › Vulnerabilities

CVE-2026-1143: TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg buffer overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-19 · updated 2026-06-17
• Weakness: CWE-119

Description

A weakness has been identified in TOTOLINK A3700R 9.1.2u.5822_B20200513. This affects the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ssid can lead to buffer overflow. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

• TOTOLINK A3700R: 9.1.2u.5822_b20200513

References

• https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff?source=copy_link
• https://vuldb.com/?ctiid.341735
• https://vuldb.com/?id.341735
• https://vuldb.com/?submit.735502
• https://www.totolink.net/

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