Full Report
Mitel security advisory (AV26-734)
Analysis Summary
# Vulnerability: Multiple Flaws in Mitel MiCollab and OpenScape UC
## CVE Details
*Note: The primary source document identifies the advisories but does not explicitly list the numeric CVE IDs. Based on the advisory titles provided:*
**Vulnerability 1: MiCollab Command Injection**
- **CVE ID:** Pending/See MISA-2026-0006
- **CVSS Score:** Potentially 9.0+ (Critical) based on the "Command Injection" classification
- **CWE:** CWE-78 (Improper Neutralization of Special Elements used in an OS Command)
**Vulnerability 2: OpenScape UC Reflected XSS**
- **CVE ID:** Pending/See MISA-2026-0007
- **CVSS Score:** Potentially 6.1 (Medium)
- **CWE:** CWE-79 (Improper Neutralization of Input During Web Page Generation)
## Affected Systems
- **Products:**
- Mitel MiCollab
- Mitel OpenScape UC
- **Versions:**
- MiCollab: Multiple versions (Refer to MISA-2026-0006 for specific build numbers)
- OpenScape UC: Multiple versions (Refer to MISA-2026-0007 for specific build numbers)
- **Configurations:** Default installations using web-based management or collaboration interfaces.
## Vulnerability Description
- **Command Injection (MiCollab):** A flaw in the application's processing of user-supplied input allows an attacker to inject arbitrary system commands. This typically occurs when input is passed to a system shell without sufficient validation or escaping.
- **Reflected XSS (OpenScape UC):** A flaw in the web interface where malicious scripts are "reflected" off the web server to the victim's browser. This occurs when the application includes untrusted data in a web page without proper validation.
## Exploitation
- **Status:** Not explicitly stated as exploited in the wild (refer to vendor portal for the latest active exploitation telemetry).
- **Complexity:**
- Command Injection: Low to Medium
- Reflected XSS: Medium (Requires user interaction)
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High (Full data access via Command Injection)
- **Integrity:** High (System modification via Command Injection)
- **Availability:** High (Potential for full system shutdown or service disruption)
## Remediation
### Patches
Mitel recommends updating to the latest maintenance releases for the following product lines:
- **MiCollab:** Apply updates as specified in MISA-2026-0006.
- **OpenScape UC:** Apply updates as specified in MISA-2026-0007.
### Workarounds
- **Network Segmentation:** Ensure that MiCollab and OpenScape management interfaces are not exposed to the public internet.
- **WAF Rules:** Deploy Web Application Firewall (WAF) signatures to detect and block common Command Injection and XSS patterns.
## Detection
- **Indicators of Compromise:**
- Unexplained outbound network connections from the MiCollab server.
- Appearance of unusual files in `/tmp` or web root directories.
- Audit logs showing unexpected shell executions (e.g., `sh`, `bash`, `cmd.exe`).
- **Detection methods:** Review web server access logs for suspicious query parameters involving script tags or shell metacharacters (`;`, `&`, `|`, `` ` ``).
## References
- hxxps[://]www[.]mitel[.]com/support/security-advisories/mitel-product-security-advisory-misa-2026-0006
- hxxps[://]www[.]mitel[.]com/support/security-advisories/mitel-product-security-advisory-misa-2026-0007
- hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/mitel-security-advisory-av26-734