CVE-2026-19586

Pre-Authentication OS Command Injection in Omada Gateways on OpenVPN Server in Omada Gateways

State: Published
Severity: 9.3 Critical
Published: Aug 20, 2026
Updated: Aug 28, 2026
Reserved: Aug 12, 2026

Description

A pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to operate as an OpenVPN Server due to insufficient validation of client-supplied data during OpenVPN connection establishment. An unauthenticated remote attacker may provide specially crafted input influencing backend command execution logic before authentication completes. Exploitation requires the OpenVPN Server feature to be enabled, VPN service reachable by the attacker and attacker to be able to initiate an OpenVPN connection attempt.

Successful exploitation may allow arbitrary command execution, potentially leading to full compromise of the affected device.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L	TPLink

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
ER7212PC v2TP-Link Systems Inc.	before 2.4.3 Build 20260722 Rel.40250Affected
ER605 v2TP-Link Systems Inc.	before 2.4.4 Build 20260630 Rel.14398Affected
ER7206 v2TP-Link Systems Inc.	before 2.3.5 Build 20260625 Rel.43136Affected
ER7406 v1TP-Link Systems Inc	before 1.3.4 Build 20260625 Rel.43136Affected
ER707-M2 v1TP-Link Systems Inc.	before 1.4.4 Build 20260625 Rel.43063Affected
ER7412-M2 v1TP-Link Systems Inc	before 1.2.0 Build 20260630 Rel.82947Affected
ER8411 v1TP-Link Systems Inc.	before 1.4.1 Build 20260708 Rel.64832Affected
ER706W v1TP-Link Systems Inc.	before 1.2.11 Build 20260723 Rel.41567Affected
v1TP-Link Systems Inc.	before 1.2.6 Build 20260723 Rel.41321Affected
ER706W-4G v2TP-Link Systems Inc.	before 2.1.11 Build 20260723 Rel.41624Affected
ER706WP-4G v1TP-Link Systems Inc.	before 1.1.11 Build 20260723 Rel.41624Affected
ER703WP-4G-Outdoor v1TP-Link Systems Inc.	before 1.1.7 Build 20260723 Rel.41712Affected
DR3220v-4G v1TP-Link Systems Inc.	before 1.2.0 Build 20260630 Rel.82652Affected
DR3650v v1TP-Link Systems Inc.	before 1.2.0 Build 20260630 Rel.83311Affected
DR3650v-4G v1TP-Link Systems Inc.	before 1.2.0 Build 20260630 Rel.83347Affected
ER603WP-4G-Outdoor v1TP-Link Systems Inc.	before 1.0.2 Build 20260723 Rel.43271Affected
DR3150 v1TP-Link Systems Inc.	before 1.0.1 Build 20260722 Rel.16854Affected
ER701-5G-Outdoor v1TP-Link Systems Inc.	before 1.0.3 Build 20260723 Rel.40931Affected
ER605W v2TP-Link Systems Inc.	before 2.0.4 Build 20260723 Rel.43763Affected

References

Omada Gateway Firmware Downloads (EN)patch
Omada Gateway Firmware Downloads (US)patch
https://www.tp-link.com/us/support/faq/5256/vendor-advisory
https://mattg.systems/posts/cve-2026-19586/third-party-advisory

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