# CVE-2026-67279: Mikrotik RouterOS improper behavioral workflow enforcement

Source: https://junglewise.ai/threats/cve-2026-67279-mikrotik-routeros-improper-behavioral-workflow-enforcement  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-05. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-67279 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2026-09-05

Mikrotik RouterOS is network routing software used by enterprises to manage connectivity and traffic. This vulnerability allows unauthenticated attackers to open sessions and execute commands without valid credentials, bypassing core authentication controls. Successful exploitation could grant attackers full control over network routing, leading to traffic interception, denial of service, or network compromise.

Technologies: [MikroTik RouterOS](https://junglewise.ai/threats/technologies/routeros). Vendors: [MikroTik](https://junglewise.ai/threats/vendors/mikrotik).

## Quick answers

**Is CVE-2026-67279 exploited in the wild?** Yes. CVE-2026-67279 is known to be exploited in the wild, first recorded on 25 September 2026. Treat it as urgent.

**How severe is CVE-2026-67279?** Critical severity, with a CVSS score of 6.5, published 5 September 2026.

**Which products and versions are affected?** Mikrotik RouterOS.

**Is there a fix for CVE-2026-67279?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-67279 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-67279?** Check whether you run MikroTik RouterOS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an improper enforcement of behavioral workflow in Mikrotik RouterOS that permits unauthenticated clients to establish session channels and submit exec requests. No authentication is required; any remote attacker with network access to the device can trigger the flaw. This defect can be chained with CVE-2026-86060 to achieve unauthenticated remote code execution or command execution on the router. The vulnerability has been observed actively exploited in the wild as of September 2026.

## Affected products

- Mikrotik RouterOS

## Timeline

- 2026-09-25: disclosed
- exploited: Confirmed exploited in the wild

## Related threats

- [MikroTik RouterOS session token replay authentication bypass in WebFig](https://junglewise.ai/threats/cve-2026-89035-mikrotik-routeros-through-7-24-5-contains-a-session-token-replay)
- [MikroTik RouterOS integer overflow in ipt_SAME module](https://junglewise.ai/threats/cve-2026-112158-a-weakness-has-been-identified-in-mikrotik-routeros-up-to-6-40-5)
- [MikroTik RouterOS WinBox incorrect authorization in authentication](https://junglewise.ai/threats/cve-2026-103903-an-incorrect-authorization-vulnerability-in-the-winbox)
- [MikroTik RouterOS integer underflow](https://junglewise.ai/threats/cve-2026-84411-mikrotik-routeros)
- [MikroTik RouterOS improper input validation in BGP labelled-VPN NLRI](https://junglewise.ai/threats/cve-2026-93345-mikrotik-routeros-before-7-25beta4-contains-an-improper-input)