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CVE-2026-19586: A pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to…

CVE-2026-19586 is rated critical with a CVSS v3.1 base score of 9.8 and NVD lists 18 affected products, including TP Link Er7212pc Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability 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.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-78: Improper Neutralization of Special Elements used in an OS Command

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.

Affected products

  • TP Link Er7212pc Firmware: before 2.4.3
  • TP Link Er605 Firmware: before 2.4.4
  • TP Link Er605w Firmware: before 2.0.4
  • TP Link Er7206 Firmware: before 2.3.5
  • TP Link Er7406 Firmware: before 1.3.4
  • TP Link Er707 M2 Firmware: before 1.4.4
  • TP Link Er7412 M2 Firmware: before 1.2.0
  • TP Link Er8411 Firmware: before 1.4.1
  • TP Link Er706w Firmware: before 1.2.11
  • TP Link Er706w 4g Firmware: before 1.2.6; before 2.1.11
  • TP Link Er706wp 4g Firmware: before 1.1.11
  • TP Link Er703wp 4g Outdoor Firmware: before 1.1.7
  • TP Link Er603wp 4g Outdoor Firmware: before 1.0.2
  • TP Link Er701 5g Outdoor Firmware: before 1.0.3
  • TP Link Dr3220v 4g Firmware: before 1.2.0

References