Vulnerability · Published Apr 28, 2026 · Assigned by VulDB
CVE-2026-7218Totolink N300RT libapmib.so formWsc is_cmd_string_valid buffer overflow
High 7.2
In plain English
A high-severity buffer overflow in N300RT from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.5%top 59.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was detected in Totolink N300RT 3.4.0-B20250430. The impacted element is the function is_cmd_string_valid of the file /boafrm/formWsc of the component libapmib.so. Performing a manipulation of the argument localPin results in buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-359818 | Totolink N300RT libapmib.so formWsc is_cmd_string_valid buffer overflow vdb-entry, technical-description
- VDB-359818 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #802127 | Totolink N300RT Router V3.4.0-B20250430 Buffer Overflow third-party-advisory
- https://github.com/xiaohaiyang-ai/TOTOLINK-N300RT-Buffer-Overflow exploit
- https://www.totolink.net/ product