What’s Vulnerable › Vulnerabilities

CVE-2025-12239: TOTOLINK A3300R cstecgi.cgi setDdnsCfg 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 weakness has been identified in TOTOLINK A3300R 17.0.0cu.557_B20221024. The impacted element is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Executing manipulation can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be exploited.

Affected products

• Totolink A3300R: 17.0.0cu.557_b20221024

References

• https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setDdnsCfg.md
• https://vuldb.com/?ctiid.329909
• https://vuldb.com/?id.329909
• https://vuldb.com/?submit.673721
• https://www.totolink.net/

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