---
title: "CVE-2024-55550: Mitel MiCollab Path Traversal Vulnerability"
url: https://erroneo.us/security/cve/CVE-2024-55550/
description: "CVE-2024-55550 (Mitel MiCollab): Exploited in the wild (CISA KEV). Mitel MiCollab through 9.8 SP2 could allow an authenticated attacker with administrative…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-12-10
date_modified: 2026-08-04
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-55550"
kev: true
cvss: 4.4
epss: 0.38155
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-55550: Mitel MiCollab Path Traversal Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Mitel MiCollab. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-01-07, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-01-28 ; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns .
- EPSS 38.2% , percentile 99: FIRST’s model estimates a 38.2% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.

## What it is

Mitel MiCollab through 9.8 SP2 could allow an authenticated attacker with administrative privilege to conduct a local file read, due to insufficient input sanitization. A successful exploit could allow the authenticated admin attacker to access resources that are constrained to the admin access level, and the disclosure is limited to non-sensitive system information. This vulnerability does not allow file modification or privilege escalation.

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 4.4 `CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N`

## Exploitation

- CISA KEV: added 2025-01-07; federal due date 2025-01-28. Known ransomware use: Known.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 38.16% probability of exploitation activity in the next 30 days; percentile 99.

## Sources

- [Listed in CISA KEV notes (mitel.com)](https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-misa-2024-0029)
- [CVE.org record CVE-2024-55550](https://www.cve.org/CVERecord?id=CVE-2024-55550)
- [NVD entry CVE-2024-55550](https://nvd.nist.gov/vuln/detail/CVE-2024-55550)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55550)
- [mitel.com](https://www.mitel.com/support/security-advisories)

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Source page: https://erroneo.us/security/cve/CVE-2024-55550/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt