What’s Vulnerable › Vulnerabilities

CVE-2025-12240: TOTOLINK A3300R cstecgi.cgi setDmzCfg buffer overflow

• Severity: critical (CVSS 9.8 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: 2025-10-27 · updated 2026-10-08
• Weakness: CWE-119

Description

A security vulnerability has been detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This affects the function setDmzCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ip leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

Affected products

• Totolink A3300R: 17.0.0cu.557_b20221024

References

• https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setDmzCfg.md
• https://vuldb.com/?ctiid.329910
• https://vuldb.com/?id.329910
• https://vuldb.com/?submit.673722
• https://www.totolink.net/

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