Cyber Resilience

CVE-2024-55550

Path Traversal in Mitel Micollab ≤ 9.8.1.201

CISA KEVActive ExploitationEUVD ExploitedRansomware-linkedPath Traversal
Published
10 December 2024
Modified
04 August 2026
KEV Added
07 January 2025
Patch / advisory
CVSS Score v3.1 2.7
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
EPSS Score 0.38 98th percentile
Risk Priority 75 floored blend · peak EPSS

Summary

CVE-2024-55550 is a low-severity Path Traversal (CWE-22) vulnerability in Mitel Micollab. Its CVSS base score is 2.7 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 2% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

Mitel MiCollab through version 9.8 SP2 contains a path traversal vulnerability (CWE-22) that stems from insufficient input sanitization. An authenticated administrative user can supply crafted input to read arbitrary local files on the affected system. The flaw is rated CVSS 2.7 and permits access only to non-sensitive system information within the administrator’s existing privilege level; it does not enable file modification or privilege escalation.

An attacker who already possesses administrative credentials can exploit the issue over the network to retrieve files that would otherwise be inaccessible through normal administrative interfaces. Because the vulnerability requires high privileges, the attack surface is limited to insiders or compromised admin accounts, and successful exploitation yields only read access to constrained, non-sensitive resources.

Mitel has published security advisory MISA-2024-0029, available alongside general product security updates at mitel.com/support/security-advisories, that addresses the flaw. The advisory outlines the affected releases and directs administrators to apply the vendor-supplied remediation.

The CVE appears in CISA’s Known Exploited Vulnerabilities catalog, confirming observed in-the-wild exploitation. Its EPSS score rose from a low baseline after disclosure to a peak of 0.4272 on 2025-01-09 before receding to the current value of 0.1772, indicating a measurable increase in exploitation interest following public release.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

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…

more

the admin access level, and the disclosure is limited to non-sensitive system information. This vulnerability does not allow file modification or privilege escalation.

CWE(s)
KEV Date Added
07 January 2025

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-41713Same product: Mitel Micollabboth on KEV
CVE-2023-40266Same vendor: Mitel
CVE-2024-1708Shared CWE-22both on KEV
CVE-2021-42013Shared CWE-22both on KEV
CVE-2019-7194Shared CWE-22both on KEV
CVE-2021-20123Shared CWE-22both on KEV
CVE-2019-16278Shared CWE-22both on KEV
CVE-2019-5418Shared CWE-22both on KEV
CVE-2017-12637Shared CWE-22both on KEV
CVE-2016-3976Shared CWE-22both on KEV

Affected Assets

mitel
micollab
≤ 9.8.1.201

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V5.3.2

Mitigating Controls (NIST 800-53 r5) AI

Enforces the intended directory access authorizations that path traversal would otherwise bypass.

Input validation directly neutralizes special path elements before pathname construction occurs.

Least privilege reduces the impact of any unauthorized file access obtained via traversal.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-02 partial match
prevents

Patching/maintenance can remediate known path-traversal flaws in deployed software (partial prevention of exploitability) but does nothing to stop the coding defect from being introduced in the first place.

PR.AA-05 none match
prevents

PR.AA-05 defines and reviews access policies but does not address code-level pathname neutralization, so neither direction prevents CWE-22.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Security testing in development catches path traversal via static/dynamic analysis.

prevents

Secure SDLC mandates input validation and path sanitization that directly prevent path traversal.

prevents

Application security requirements include rules for safe file handling and canonicalization.

prevents

Secure architecture principles require least-privilege file access and directory isolation.

prevents

Secure coding standards explicitly forbid unsafe path construction and mandate safe APIs.

mitigates

Information access restriction limits which files an application may read or write.

References