Threats / Mitel / CVE-2024-55550
CVE-2024-55550
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Mitel MiCollab vulnerability
Mitel MiCollab contains a path traversal vulnerability (CWE-22) allowing authenticated administrators to read local files through insufficient input sanitization. When chained with CVE-2024-41713, unauthenticated attackers can read arbitrar
Verdict
Today item, not a backlog item.
This path traversal vulnerability enables file disclosure on MiCollab systems. Exploitation in the wild and association with ransomware campaigns indicates active adversary interest. Chaining with unauthenticated access vectors significantly increases risk.
CISA KEV Yes · 2025-01-074Ransomware use Flagged4EPSS 0.38104 (verify live)5CVSS 4.4 (CISA)3CISA SSVC Exploitation: active · Automatable: yes · Impact: partial3Exploit Public PoC / detection · nuclei template12
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
7 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-01-07), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.38104 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 4.4 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N) · Affected: Mitel, MiCollab. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-22 Path Traversal — weakness family: Path traversal / file.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: partialCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 28 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a public proof-of-concept / detection template). Catalog entries: nuclei template. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I exploit CVE-2024-41713 to gain unauthenticated remote access and read files from the MiCollab server.
Business
Attackers obtain initial reconnaissance data and sensitive configuration files without credentials.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I extract administrative credentials or session tokens from disclosed files to escalate privileges.
Business
Attackers pivot from file read access to authenticated administrative control of the collaboration platform.
3
Lateral reach — past segmentation narrative 3
Attacker
I use the path traversal vulnerability with administrative access to read sensitive application and system files.
Business
Attackers gather intelligence on internal systems, user data, and encryption keys to support ransomware deployment.
4
Data at risk — exfiltration narrative 4
Attacker
I exfiltrate confidential communications, contact lists, and business data from MiCollab storage.
Business
Attackers obtain leverage for extortion and establish persistence for ransomware encryption campaigns.
5
Lights out — disruption & extortion narrative 5
Attacker
I deploy ransomware across the organization using administrative access and system knowledge gained from file disclosure.
Business
Operations halt, data is encrypted, and the organization faces extortion demands and potential data breach liability.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05