CVE-2025-12258

A vulnerability was detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. Impacted is the function setOpModeCfg of the file /cgi-bin/cstecgi.cg of the component POST Parameter Handler. The manipulation of the argument opmode results in stack-based buffer overflow. The attack may be performed from remote.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-121

Published

2025-10-27

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• totolink:a3300r_firmware

References

• https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setOpModeCfg.md
• https://vuldb.com/?ctiid.329929
• https://vuldb.com/?id.329929
• https://vuldb.com/?submit.673725
• https://www.totolink.net/

Check your stackJSON