What is CVE-2026-7218?

CVE-2026-7218 is a high-severity vulnerability in Totolink N300rt, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.2/10. Published 2026-04-28.

How severe is CVE-2026-7218?

High severity. CVSS v3 base score is 7.2 out of 10.

Buffer overflow in Totolink N300rt

CVE-2026-7218

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.

Vulnerability class: Buffer Overflow

Published 2026-04-28 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.004

Affected products

Totolink N300rt — versions 3.4.0-B20250430

Weakness classification (CWE)

References

vuldb.com/vuln/359818 (technical-description, vdb-entry)
vuldb.com/vuln/359818/cti (signature, permissions-required)
vuldb.com/submit/802127 (third-party-advisory)
github.com/xiaohaiyang-ai/TOTOLINK-N300RT-Buffer-Overflow (exploit)
www.totolink.net/ (product)

Frequently asked questions

What is CVE-2026-7218?: CVE-2026-7218 is a high-severity vulnerability in Totolink N300rt, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.2/10. Published 2026-04-28.
How severe is CVE-2026-7218?: High severity. CVSS v3 base score is 7.2 out of 10.