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
CVE-2026-19586 is a critical OS command injection vulnerability in TP-Link ER7212PC v2 devices configured as OpenVPN servers. It allows unauthenticated remote attackers to execute arbitrary commands by sending crafted input during OpenVPN connection establishment before authentication. Exploitation requires the OpenVPN Server feature to be enabled and reachable by the attacker. Successful exploitation could lead to full device compromise.
CVSS v4.0
Score 9.3critical
Affected software
TP-Link Systems Inc.
ER7212PC v2
TP-Link Systems Inc.
ER605 v2
TP-Link Systems Inc.
ER7206 v2
TP-Link Systems Inc
ER7406 v1
TP-Link Systems Inc.
ER707-M2 v1
TP-Link Systems Inc
ER7412-M2 v1
TP-Link Systems Inc.
ER8411 v1
TP-Link Systems Inc.
ER706W v1
TP-Link Systems Inc.
v1
TP-Link Systems Inc.
ER706W-4G v2
TP-Link Systems Inc.
ER706WP-4G v1
TP-Link Systems Inc.
ER703WP-4G-Outdoor v1
TP-Link Systems Inc.
DR3220v-4G v1
TP-Link Systems Inc.
DR3650v v1
TP-Link Systems Inc.
DR3650v-4G v1
TP-Link Systems Inc.
ER603WP-4G-Outdoor v1
TP-Link Systems Inc.
DR3150 v1
TP-Link Systems Inc.
ER701-5G-Outdoor v1
TP-Link Systems Inc.
ER605W v2
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper neutralization of special elements in client-supplied data during OpenVPN connection setup on TP-Link ER7212PC v2 devices. An unauthenticated attacker can inject OS commands by manipulating input before authentication completes, potentially executing arbitrary commands on the device. The attack surface is limited to devices with OpenVPN Server enabled and accessible to the attacker. The CVSS 4.0 score is 9.3, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
An unauthenticated remote attacker can execute arbitrary OS commands on the affected device, potentially leading to full compromise. This includes control over device functions and data, posing significant security risks to network infrastructure relying on the affected device.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, disable the OpenVPN Server feature if not required or restrict access to the VPN service to trusted networks only to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-08-12T00:06:23.069Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a874d0dacd9273b49024612
Added to database: 08/20/2026, 18:53:01 UTC
Last enriched: 09/10/2026, 23:17:04 UTC
Last updated: 10/04/2026, 18:53:14 UTC
Views: 73
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