CVE-2024-55550
LowExploitedPublic exploitMitel MiCollab through 9.8 SP2 could allow an authenticated attacker with administrative privilege to conduct a local file read, due to insufficient input sanitization.
Published Dec 10, 2024 · Updated Aug 4, 2026
Key Facts
Patch immediately- CVE-2024-55550 is a low-severity vulnerability (CVSS 2.7 v3.1) affecting Micollab (Mitel).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 11, 2024 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 38% probability of exploitation in the next 30 days.
- Fixed versions are available, including Micollab <=9.8.1.201, Micollab 9.8.1.201.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
2.7
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
38%
Higher than 98.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2024-55550 brief as a PDF
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Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 7, 2025 | Jan 28, 2025 | Known |
| Industry KEV feed | Dec 11, 2024 | Jan 28, 2025 | Known |
| CIRCL KEV | Jan 7, 2025 | Jan 28, 2025 | Known |
| ENISA EUVD | Jan 7, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| MicollabMitel | See advisory | 9.8.1.201 |
Patched Releases
Micollab
<=9.8.1.201
Timeline
Publicly disclosed
Dec 10, 2024
Added to Industry KEV feed
Dec 11, 2024
Added to CISA KEV
Jan 7, 2025
Added to CIRCL KEV
Jan 7, 2025
Added to ENISA EUVD
Jan 7, 2025
Last updated
Aug 4, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- advisoryhttps://www.mitel.com/support/security-advisories
- advisoryhttps://www.mitel.com/support/security-advisories/mitel-product-security-advisory-misa-2024-0029
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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.
Affected: Micollab (Mitel). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 11, 2024 and is known to be used in ransomware campaigns.
Yes. It was added on Jan 7, 2025 with a federal remediation due date of Jan 28, 2025.
Public exploit code is available.
Fixed versions are available, including Micollab <=9.8.1.201, Micollab 9.8.1.201.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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