Full Report
Mitel security advisory (AV26-250)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Mitel Contact Center Solutions
## CVE Details
- **CVE ID:** CVE-2026-25983 (Primary), CVE-2026-25984
- **CVSS Score:** 9.8 (Critical)
- **CWE:** CWE-78 (OS Command Injection), CWE-287 (Improper Authentication)
## Affected Systems
- **Products:** Mitel CX, MiContact Center Business
- **Versions:**
- Mitel CX: Version 2.0.0.1 and prior
- MiContact Center Business: Version 10.2.0.11 and prior
- **Configurations:** Systems exposed to the network/internet without updated security patches.
## Vulnerability Description
The vulnerabilities involve a combination of improper authentication and OS command injection flaws within the management interface of the affected contact center products. Specifically, an unauthenticated attacker can send specially crafted network requests to the vulnerable service, allowing for the execution of arbitrary commands with elevated privileges on the underlying operating system.
## Exploitation
- **Status:** PoC available (Note: Emerging reports suggest targeted exploitation in the wild following disclosure).
- **Complexity:** Low
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** Total (Full access to sensitive customer data and call logs)
- **Integrity:** Total (Ability to modify system configurations and software)
- **Availability:** Total (Potential for complete system shutdown or ransomware deployment)
## Remediation
### Patches
Mitel recommends upgrading to the following versions or later:
- **Mitel CX:** Version 2.1.0.0
- **MiContact Center Business:** Version 10.3.0.0
### Workarounds
- **Network Segmentation:** Ensure the management interface is not exposed to the public internet.
- **Access Control:** Restrict access to the management console to trusted internal IP addresses via firewall ACLs.
- **Service Disablement:** Disable unused features or web-based management portals if not required for daily operations.
## Detection
- **Indicators of Compromise:**
- Unusual outbound traffic from the Mitel server to unknown external IP addresses.
- Presence of unexpected web shells or scripts in the web server directories.
- Audit logs showing administrative actions performed by unauthorized or non-existent user accounts.
- **Detection Methods and Tools:**
- Monitor web server logs for HTTP POST requests containing shell commands.
- Use SIEM rules to flag unauthorized execution of `cmd.exe` or `/bin/sh` originating from the Mitel application process.
## References
- Mitel Product Security Advisory MISA-2026-0001: hxxps[://]www[.]mitel[.]com/support/security-advisories/mitel-product-security-advisory-misa-2026-0001
- Mitel Security Bulletins: hxxps[://]www[.]mitel[.]com/support/security-advisories
- Canadian Centre for Cyber Security (AV26-250): hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/mitel-security-advisory-av26-250