CVE-2017-18046

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-01-21 · updated 2026-06-17
Weakness: CWE-119

Description

Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).

Affected products

Dasannetworks H640X Firmware: 2.77p1-1124, 3.03p2-1146, 12.02-01121

References

https://blogs.securiteam.com/index.php/archives/3552
https://pastebin.com/Yxd9S46A
https://twitter.com/ankit_anubhav/status/982261670394249216
https://blogs.securiteam.com/index.php/archives/3552
https://pastebin.com/Yxd9S46A
https://twitter.com/ankit_anubhav/status/982261670394249216

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