# CVE-2026-67279: Mikrotik RouterOS Improper Enforcement of Behavioral Workflow

> Unauthenticated attackers can bypass SSH authentication to create, overwrite, or reconstruct files in MikroTik RouterOS, exposing configuration and diagnostic data.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Yes, since 25 Sep 2026 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Sep 2026
- **Updated:** 26 Sep 2026
- **Also known as:** GHSA-pqp3-gjgf-83cf, openSUSE-SU-2026:11737-1

## What is CVE-2026-67279?

CVE-2026-67279 is a medium-severity authentication bypass vulnerability in Mikrotik Routeros, published on 5 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

RouterOS SSH enters the connection protocol after a client-requested rekey even though user authentication was never attempted, allowing an unauthenticated client to open a session channel and send an exec request. On affected builds the server dispatches the command, enabling unauthenticated creation, overwrite, and reconstruction of files in the RouterOS managed file namespace, including support files containing configuration and diagnostic data.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)

Weakness: CWE-841 (Improper Enforcement of Behavioral Workflow)

## Which versions are affected by CVE-2026-67279?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `sshamble` | openSUSE:Tumbleweed | All versions | 0.3.12-1.1 |

Products: Mikrotik Routeros.

## How do I fix CVE-2026-67279?

Upgrade to a fixed version. US federal agencies must fix it by 28 Sep 2026.

## Is CVE-2026-67279 being exploited?

Yes. Attackers have exploited CVE-2026-67279 in the wild since at least 25 Sep 2026.

Public exploit code:

- CVE-2026-67279 + CVE-2026-86060 – MikroTrick MikroTik RouterOS SSH Pre-Auth Takeover (CVSS 9.2) | Red/Blue Team suite. 2 tools: Full Exploit (rekey bypass, fd-2 policy swap, full-admin shell, plant, mass scan, SOCKS5/Tor, stealth) & SafeDetect (banner/version audit, IoC guidance, JSON/CSV/HTML). Use Ethically & Safety only. (github_poc): https://github.com/tc4dy/CVE-2026-67279-86060-Toolkit
- MikroTrick (MikroTik RouterOS SSH takeover chain) PoC mirror - CVE-2026-67279 + CVE-2026-86060 (+67276); for authorized lab testing (github_poc): https://github.com/HackSpeak/CVE-2026-67279
- Laboratory proof of concept and research notes for CVE-2026-67279 on MikroTik RouterOS 6.42. (github_poc): https://github.com/shmaki4/CVE-2026-67279-Mikrotik-6.42-POC
- Non-destructive behavioral verifier for the MikroTik RouterOS SSH auth-bypass (CVE-2026-67279 / MikroTrick). Measures server reaction only — no exploit payload. (github_poc): https://github.com/GoldAden/mikrotrick-verifier

## Other vulnerabilities in Mikrotik Routeros

- [CVE-2018-7445](https://insights.sbomify.com/CVE-2018-7445/): MikroTik RouterOS Stack-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2026-86060](https://insights.sbomify.com/CVE-2026-86060/): MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command (critical 9.2, exploited in the wild)
- [CVE-2018-14847](https://insights.sbomify.com/CVE-2018-14847/): MikroTik Router OS Directory Traversal (critical 9.1, exploited in the wild)
- [CVE-2026-67277](https://insights.sbomify.com/CVE-2026-67277/): MikroTik RouterOS Missing Authentication for Critical Function (high 8.8, exploited in the wild)
- [CVE-2017-20149](https://insights.sbomify.com/CVE-2017-20149/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-67279 and fix it if it is affected.

What it is: CVE-2026-67279 is a medium-severity authentication bypass vulnerability in Mikrotik Routeros, published on 5 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2026-67279 in the wild since at least 25 Sep 2026.

Affected product: Mikrotik Routeros. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-67279/ (Markdown: https://insights.sbomify.com/CVE-2026-67279/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-67279
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-67279
- OSV: https://osv.dev/vulnerability/CVE-2026-67279

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-67279/
Summaries are generated and may contain mistakes; the official description above is the record.