CVE-2026-7719: critical vulnerability in Totolink WA300
Totolink WA300 POST Request cstecgi.cgi loginauth buffer overflow
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.3epss 0.6%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Affected products
Totolink · WA300public PoCs found — 1
cve_referencelavender-bicycle-a5a.notion.site/TOTOLINK-WA300-loginAuth-34553a41781f8050b8ffc9e90a103cd5unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Totolink WA300
In the same product, most dangerous first.
CVE-2026-2167MEDIUMTotolink WA300 cstecgi.cgi setAPNetwork os command injectionEPSS 2.5%CVE-2026-4497MEDIUMTotolink WA300 cstecgi.cgi recvUpgradeNewFw os command injectionEPSS 2.2%CVE-2026-7721MEDIUMTotolink WA300 cstecgi.cgi NTPSyncWithHost command injectionEPSS 1.0%CVE-2026-7720MEDIUMTotolink WA300 POST Request cstecgi.cgi setLanguageCfg command injectionEPSS 1.0%CVE-2026-7718MEDIUMTotolink WA300 POST Request cstecgi.cgi setWebWlanIdx command injectionEPSS 1.0%CVE-2026-7717HIGHTotolink WA300 POST Request cstecgi.cgi UploadCustomModule buffer overflowEPSS 0.5%