CVE-2026-19586: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in TP-Link Systems Inc. ER7212PC v2
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-19586) affects TP-Link Systems Inc. ER7212PC v2 devices configured as OpenVPN Servers. It arises from improper neutralization of special elements in OS commands (CWE-78), allowing an unauthenticated remote attacker to inject OS commands during OpenVPN connection establishment. The attacker can provide specially crafted input that influences backend command execution logic before authentication completes. This can result in arbitrary command execution on the device, potentially leading to full compromise. Exploitation requires the OpenVPN Server feature to be enabled and reachable by the attacker, who must initiate an OpenVPN connection attempt. The CVSS 4.0 score is 9.3 (critical), reflecting network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently provided.
Potential Impact
An unauthenticated remote attacker can execute arbitrary OS commands on the affected device before authentication, potentially leading to full device compromise. This impacts confidentiality, integrity, and availability of the device and its network functions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the meantime, disable the OpenVPN Server feature if not required or restrict network access to the VPN service to trusted sources only.
CVE-2026-19586: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in TP-Link Systems Inc. ER7212PC v2
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.
CVSS v4.0
Score 9.3critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-19586) affects TP-Link Systems Inc. ER7212PC v2 devices configured as OpenVPN Servers. It arises from improper neutralization of special elements in OS commands (CWE-78), allowing an unauthenticated remote attacker to inject OS commands during OpenVPN connection establishment. The attacker can provide specially crafted input that influences backend command execution logic before authentication completes. This can result in arbitrary command execution on the device, potentially leading to full compromise. Exploitation requires the OpenVPN Server feature to be enabled and reachable by the attacker, who must initiate an OpenVPN connection attempt. The CVSS 4.0 score is 9.3 (critical), reflecting network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently provided.
Potential Impact
An unauthenticated remote attacker can execute arbitrary OS commands on the affected device before authentication, potentially leading to full device compromise. This impacts confidentiality, integrity, and availability of the device and its network functions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the meantime, disable the OpenVPN Server feature if not required or restrict network access to the VPN service to trusted sources only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-08-12T00:06:23.069Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a874d0dacd9273b49024612
Added to database: 08/20/2026, 18:53:01 UTC
Last enriched: 08/20/2026, 19:07:07 UTC
Last updated: 08/20/2026, 19:32:00 UTC
Views: 4
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