CVE-2025-12240
criticalA security vulnerability has been detected in TOTOLINK A3300R 17.0.0cu.557_B20221024.
Vendor / product: Totolink — a3300r firmware
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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2025-10-27 07:15
Modified: 2026-10-08 11:10
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
totolink / a3300r_firmware 17.0.0cu.557_b20221024
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setDmzCfg.md cna@vuldb.com
- https://vuldb.com/?ctiid.329910 cna@vuldb.com
- https://vuldb.com/?id.329910 cna@vuldb.com
- https://vuldb.com/?submit.673722 cna@vuldb.com
- https://www.totolink.net/ cna@vuldb.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗