Cisco has released a security advisory detailing a high-severity vulnerability in Cisco Meeting Management (CMM).
The flaw, caused by improper input validation, allows authenticated remote attackers to upload arbitrary files and potentially execute commands with root privileges.
The vulnerability is located within the Certificate Management feature of the CMM web-based management interface. It has been assigned a CVSS base score of 8.8 (High).
Technical Details and Exploitation
The vulnerability, tracked as CVE-2026-20098, stems from a failure to validate input in specific sections of the web interface properly.
To exploit this flaw, an attacker must possess valid credentials for a user account with at least the video operator role.
By sending a crafted HTTP request to a vulnerable system, an authenticated attacker can upload arbitrary files.
| Property | Details |
|---|---|
| CVE ID | CVE-2026-20098 |
| Advisory ID | cisco-sa-cmm-file-up-kY47n8kK |
| CVSS Score | 8.8 (High) |
These malicious files can potentially overwrite system files that are subsequently processed by the root system account.
Successful exploitation allows the attacker to execute arbitrary commands on the underlying operating system with elevated root privileges, effectively granting complete control over the compromised device.
This vulnerability affects Cisco Meeting Management versions 3.12 and earlier, regardless of device configuration.
Administrators should upgrade to the release listed below to remediate the vulnerability.
| Cisco Meeting Management Release | First Fixed Release |
|---|---|
| 3.12 and earlier | 3.12.1 MR |
Cisco has confirmed that no workarounds are available to mitigate this issue. Administrators are urged to apply the official software updates immediately to prevent potential compromise.
Cisco noted that they are not aware of any public announcements or malicious use of this vulnerability in the wild.
The issue was responsibly reported to Cisco by the NATO Cyber Security Centre Penetration Testing Team.
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