Buffer overflow in Totolink Wa300
CVE-2026-7719
A security flaw has been discovered in Totolink WA300 5.2cu.7112_B20190227. The affected element is the function loginauth of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument http_host results in buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (62.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.0% 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: 0.010 · change: +0.004
Affected products
- Totolink Wa300 — versions 5.2cu.7112_B20190227
Weakness classification (CWE)
References
- vuldb.com/vuln/360895 (technical-description, vdb-entry)
- vuldb.com/vuln/360895/cti (signature, permissions-required)
- vuldb.com/submit/807197 (third-party-advisory)
- lavender-bicycle-a5a.notion.site/TOTOLINK-WA300-loginAuth-34553a41781f8050b8ffc… (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-7719?
- CVE-2026-7719 is a critical-severity vulnerability in Totolink Wa300, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2026-05-04.
- How severe is CVE-2026-7719?
- Critical severity. CVSS v3 base score is 9.8 out of 10.