No exploitation reportedFix available

CVE-2019-15066

Q: Is CVE-2019-15066 actively exploited?

Active exploitation of CVE-2019-15066 has not been confirmed. Its EPSS score was 1.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-15066?

CVE-2019-15066 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2019-10-17
Fixed ini040gwr190731

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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).

Timeline

dates in UTC

2019-10-1720:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-15066?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-15066?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Hinet gpon firmwareversion to verify

Branch	Affected	Fixed in	Source
—	< i040gwr190731	i040gwr190731	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Hinet gpon firmware to i040gwr190731

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.110read 2026-10-23
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
FIRST EPSSEPSS score1.6 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2019-10-17
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-15066?

Is CVE-2019-15066 actively exploited?

Active exploitation of CVE-2019-15066 has not been confirmed. Its EPSS score was 1.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-15066?

CVE-2019-15066 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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