CVE-2026-19586: Pre-Authentication OS Command Injection in Omada Gateways on OpenVPN Server in Omada Gateways

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-20 · updated 2026-10-26
Weakness: CWE-78

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.

Affected products

TP-Link Dr3150 Firmware: before 1.0.1 — fixed in 1.0.1
TP-Link Dr3220V-4G Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Dr3650V-4G Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Dr3650V Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Er603Wp-4G-Outdoor Firmware: before 1.0.2 — fixed in 1.0.2
TP-Link Er605 Firmware: before 2.4.4 — fixed in 2.4.4
TP-Link Er605W Firmware: before 2.0.4 — fixed in 2.0.4
TP-Link Er701-5G-Outdoor Firmware: before 1.0.3 — fixed in 1.0.3
TP-Link Er703Wp-4G-Outdoor Firmware: before 1.1.7 — fixed in 1.1.7
TP-Link Er706W-4G Firmware: before 1.2.6; before 2.1.11 — fixed in 1.2.6, 2.1.11
TP-Link Er706W Firmware: before 1.2.11 — fixed in 1.2.11
TP-Link Er706Wp-4G Firmware: before 1.1.11 — fixed in 1.1.11
TP-Link Er707-M2 Firmware: before 1.4.4 — fixed in 1.4.4
Tp-Link ER7206 Omada Gigabit VPN Router: before 2.3.5 — fixed in 2.3.5
TP-Link Er7212Pc Firmware: before 2.4.3 — fixed in 2.4.3
TP-Link Er7406 Firmware: before 1.3.4 — fixed in 1.3.4
TP-Link Er7412-M2 Firmware: before 1.2.0 — fixed in 1.2.0
TP-Link Er8411 Firmware: before 1.4.1 — fixed in 1.4.1

How to fix

Upgrade to a fixed version: TP-Link Dr3150 Firmware 1.0.1; TP-Link Dr3220V-4G Firmware 1.2.0; TP-Link Dr3650V-4G Firmware 1.2.0; TP-Link Dr3650V Firmware 1.2.0; TP-Link Er603Wp-4G-Outdoor Firmware 1.0.2; TP-Link Er605 Firmware 2.4.4; TP-Link Er605W Firmware 2.0.4; TP-Link Er701-5G-Outdoor Firmware 1.0.3; TP-Link Er703Wp-4G-Outdoor Firmware 1.1.7; TP-Link Er706W-4G Firmware 1.2.6, 2.1.11; TP-Link Er706W Firmware 1.2.11; TP-Link Er706Wp-4G Firmware 1.1.11. Check the vendor advisory for mitigations.

References

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