CVE-2019-9974

diag_tool.cgi on DASAN H660RM GPON routers with firmware 1.03-0022 lacks any authorization check,...

9.1 Critical

diag_tool.cgi on DASAN H660RM GPON routers with firmware 1.03-0022 lacks any authorization check, which allows remote attackers to run a ping command via a GET request to enumerate LAN devices or crash the router with a DoS attack.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: High

Exploit likelihood

2.92%Up 1.9 points since Apr 14, 2021

What each source reports

NVD Score used 9.1

Record: CVE-2019-9974
CVSS 3.0: 9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS 2.0: 6.4 MediumAV:N/AC:L/Au:N/C:P/I:N/A:P
Weakness: CWE-306, CWE-862
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-9974
Updated: 2026-11-02

EUVDEUVD-2019-19328 No score

Record: EUVD-2019-19328
Updated: 2026-11-03

GitHub AdvisoriesGHSA-4qc2-r4q6-vfxr 9.1

diag_tool.cgi on DASAN H660RM GPON routers with firmware 1.03-0022 lacks any authorization check,...

Record: GHSA-4qc2-r4q6-vfxr
CVSS 3.0: 9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-306
Updated: 2026-11-02

Affected products

dasannetworks h660rm firmware

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-9974 is a critical vulnerability (CVSS 9.1) in Dasannetworks H660rm Firmware, published April 11, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.92%, the 87th percentile. No source names a fixed version.