CVE-2017-18046

CRITICAL EXPLOITED

Dasan GPON ONT H640X 12.02-01121 Buffer Overflow via Long POST Request

Title source: llm

Exploitation Summary

CVE-2017-18046 has been observed exploited in the wild (reported by VulnCheck KEV).

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).

References (3)

Core 3

Core References

Various Sources x_refsource_misc

https://twitter.com/ankit_anubhav/status/982261670394249216

Exploit, Third Party Advisory x_refsource_misc

https://blogs.securiteam.com/index.php/archives/3552

Various Sources x_refsource_misc

https://pastebin.com/Yxd9S46A

Scores

CVSS v3 9.8

EPSS 0.0514

EPSS Percentile 91.4%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

VulnCheck KEV 2018-02-12

CWE

CWE-119

Status published

Products (3)

dasannetworks/h640x_firmware 2.77p1-1124

dasannetworks/h640x_firmware 3.03p2-1146

dasannetworks/h640x_firmware 12.02-01121

Published Jan 21, 2018

Tracked Since Feb 18, 2026