CVE-2019-15066: A remote command execution vulnerability was discovered in HiNet GPON firmware < I040GWR190731 port 6998

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-10-17 · updated 2026-06-17

Description

An “invalid command” handler issue was discovered in HiNet GPON firmware < I040GWR190731. It allows an attacker to execute arbitrary command through port 6998. CVSS 3.0 Base score 10.0. CVSS vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

Affected products

HiNET GPON: before i040gwr190731 — fixed in i040gwr190731

How to fix

Upgrade to a fixed version: HiNET GPON i040gwr190731. Check the vendor advisory for mitigations.

References

https://tvn.twcert.org.tw/taiwanvn/TVN-201908012
https://www.twcert.org.tw/en/cp-128-3017-fd6bc-2.html
https://tvn.twcert.org.tw/taiwanvn/TVN-201908012
https://www.twcert.org.tw/en/cp-128-3017-fd6bc-2.html

Get alerted when CVE-2019-15066 or the next vulnerability affects your stack