Exploited vulnerability · CISA KEV

Is CVE-2024-55550 exploited? Yes: in CISA KEV since 7 Jan 2025

Gociux · Mitel MiCollab · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2024-55550, Mitel MiCollab Path Traversal Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 7 Jan 2025, 28 days after it was published. It is known to be used in ransomware campaigns. It affects Mitel MiCollab. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What it is

Mitel MiCollab contains a path traversal vulnerability that could allow an authenticated attacker with administrative privileges to read local files within the system due to insufficient input sanitization. This vulnerability can be chained with CVE-2024-41713, which allows an unauthenticated, remote attacker to read arbitrary files on the server.

What to do

1. Check whether you run it. Look for MiCollab in your asset inventory, including appliances and cloud images. Stack check lists every exploited Mitel CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 10 Dec 2024.
4. Get told next time. Email alerts when CISA adds a CVE for Mitel.

Other exploited CVEs in MiCollab

• CVE-2024-41713: Mitel MiCollab Path Traversal Vulnerability (7 Jan 2025)

References

• www.mitel.com/support/security-advisories/mitel-product-security-advisory
• nvd.nist.gov/vuln/detail/CVE-2024-55550

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in January 2025 · Mitel scorecard · act-now radar.