CVE-2025-12259: A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. The affected element is the function setScheduleCfg…
CVE-2025-12259 · Severity: high · CVSS 8.8 · Published 2025-10-27
A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. The affected element is the function setScheduleCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. This manipulation of the argument recHour causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used.
No. Junglewise Threat Intelligence has no report of CVE-2025-12259 being exploited in the wild.
How severe is CVE-2025-12259?
High severity, with a CVSS score of 8.8, published 27 October 2025.
Which products and versions are affected?
TOTOLINK A3300R, TOTOLINK A3300r Firmware. The advisory does not name versions.
Is there a fix for CVE-2025-12259?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-12259?
Check whether you run TOTOLINK A3300R or TOTOLINK A3300r Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.