# CVE-2022-26143: MiCollab, MiVoice Business Express Access Control

> Remote attackers can access sensitive information and cause denial of service in Mitel MiCollab due to missing authentication in the TP-240 component.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 25 Mar 2022 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Mar 2022
- **Updated:** 21 Oct 2025
- **Also known as:** CVE-2022-26487, GHSA-xh7f-2c8g-37p4

## What is CVE-2022-26143?

CVE-2022-26143 is a critical missing authorization vulnerability in n/a, published on 9 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The TP-240 (aka tp240dvr) component in Mitel MiCollab before 9.4 SP1 FP1 and MiVoice Business Express through 8.1 allows remote attackers to obtain sensitive information and cause a denial of service (performance degradation and excessive outbound traffic). This was exploited in the wild in February and March 2022 for the TP240PhoneHome DDoS attack.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2022-26143?

It affects 2 products.


Products: Mitel Micollab, Mitel Mivoice Business Express.

## How do I fix CVE-2022-26143?

No fix has been published for CVE-2022-26143 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 15 Apr 2022.

## Is CVE-2022-26143 being exploited?

Yes. Attackers have exploited CVE-2022-26143 in the wild since at least 25 Mar 2022.

Public exploit code:

- Mitel MiCollab - Information Disclosure & Denial of Service (nuclei): http/cves/2022/CVE-2022-26143.yaml

## Other vulnerabilities in n/a

- [CVE-2024-41713](https://insights.sbomify.com/CVE-2024-41713/): Mitel MiCollab Path Traversal (critical 9.1, exploited in the wild)
- [CVE-2024-55550](https://insights.sbomify.com/CVE-2024-55550/): Mitel MiCollab Path Traversal (medium 4.4, exploited in the wild)
- [CVE-2024-35285](https://insights.sbomify.com/CVE-2024-35285/): Command injection in n/a (critical 9.8)
- [CVE-2024-35286](https://insights.sbomify.com/CVE-2024-35286/): SQL injection in n/a (critical 9.8)
- [CVE-2024-35314](https://insights.sbomify.com/CVE-2024-35314/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-26143 and fix it if it is affected.

What it is: CVE-2022-26143 is a critical missing authorization vulnerability in n/a, published on 9 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2022-26143 in the wild since at least 25 Mar 2022.

Affected product: n/a. 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-2022-26143/ (Markdown: https://insights.sbomify.com/CVE-2022-26143/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-26143
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-26143
- OSV: https://osv.dev/vulnerability/CVE-2022-26143

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-26143/
Summaries are generated and may contain mistakes; the official description above is the record.