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Cisco Warns of Meeting Management Flaw Enabling Arbitrary File Upload by Remote Attackers

Cisco has released a security advisory detailing a high-severity vulnerability in Cisco Meeting Management (CMM).

PBy Peter CollinsFeb 05, 20261 min read

Cisco has released a security advisory detailing a high-severity vulnerability in Cisco Meeting Management (CMM).

This 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).

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.

Cisco has released a security advisory detailing a high-severity vulnerability in Cisco Meeting Management (CMM).
Peter Collins · Thehackingpost

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.

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Administrators should upgrade to the release listed below to remediate the vulnerability.

Cisco Meeting Management Release: 3.12 and earlier First Fixed Release: 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.

The issue was responsibly reported to Cisco by the NATO Cyber Security Centre Penetration Testing Team.

Based on reporting by GBHackers.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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