VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 7 January 2025Ransomware use: known
Mitel MiCollab

CVE-2024-55550: Mitel MiCollab Path Traversal Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 7 Jan 2025, 28 days after the CVE record was published.

How likely is exploitation in the next 30 days?
38.2%

EPSS score, percentile 98.6 of all scored records

How severe?
4.4 Medium

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 28 Jan 2025. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA due date for this action: 28 January 2025.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

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.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2024-55550 to its Known Exploited Vulnerabilities (KEV) catalog on 7 Jan 2025.
  • CISA marks it as known to be used in ransomware campaigns.
  • The due date CISA sets for the required action is 28 Jan 2025.
  • The CVE record was published on 10 Dec 2024, 28 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 4.4 (Medium), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 38.2% (percentile 98.6), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact partial.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
10 Dec 2024CVE record published
7 Jan 2025Added to CISA KEV
28 Jan 2025CISA due date for the required action
4 Aug 2026CVE record last updated

References

More exploited Mitel vulnerabilities

  • CVE-2024-41710: Mitel SIP Phones Argument Injection Vulnerability (added 12 Feb 2025)
  • CVE-2024-41713: Mitel MiCollab Path Traversal Vulnerability (added 7 Jan 2025)
  • CVE-2022-40765: Mitel MiVoice Connect Command Injection Vulnerability (added 21 Feb 2023)
  • CVE-2022-41223: Mitel MiVoice Connect Code Injection Vulnerability (added 21 Feb 2023)
  • CVE-2022-29499: Mitel MiVoice Connect Data Validation Vulnerability (added 27 Jun 2022)
  • CVE-2022-26143: MiCollab, MiVoice Business Express Access Control Vulnerability (added 25 Mar 2022)