Summary
| Parameter | Value |
|---|---|
| CVE ID | CVE-2026-7719 |
| Alert Source | GitHub Advisory - Critical Vulnerability |
| CVE Publication Year | 2026 |
| Date Published | 2026-05-04 |
| Vendor | Totolink |
| Product | WA300 |
| CVSS Score | 9.8 (critical) |
| EPSS Score | No data |
| CISA KEV | No |
| Ransomware | Not confirmed |
Vulnerability Description
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.
Required Actions
Update the firmware on Totolink WA300 routers to the latest patched version immediately. Until the patch is deployed, disable remote administrative access from the internet and restrict access to the management interface to trusted IP addresses on the internal network. Monitor logs for unusual POST requests to /cgi-bin/cstecgi.cgi.
Who Is Affected?
This vulnerability affects WA300 by Totolink. Check whether your organization uses this router and immediately update the firmware and restrict device exposure.
Sources
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