Buffer overflow in Totolink N300rt
CVE-2026-7219
A flaw has been found in Totolink N300RT 3.4.0-B20250430. This affects an unknown function of the file /boafrm/formIpQoS. Executing a manipulation of the argument entry_name can lead to buffer overflow. The attack may be performed from remote. The exploit has been published and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
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 .
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: 0.006 · newest: 0.008 · change: +0.002
Affected products
- Totolink N300rt — versions 3.4.0-B20250430
Weakness classification (CWE)
References
- vuldb.com/vuln/359819 (technical-description, vdb-entry)
- vuldb.com/vuln/359819/cti (signature, permissions-required)
- vuldb.com/submit/808194 (third-party-advisory)
- github.com/xiaohaiyang-ai/IoT-Vulnerability-Research/tree/main/Vendors/TOTOLINK… (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-7219?
- CVE-2026-7219 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-2026-7219?
- High severity. CVSS v3 base score is 7.2 out of 10.