CVE-2017-12249

What it is

A vulnerability in the Traversal Using Relay NAT (TURN) server included with Cisco Meeting Server (CMS) could allow an authenticated, remote attacker to gain unauthenticated or unauthorized access to components of or sensitive information in an affected system. The vulnerability is due to an incorrect default configuration of the TURN server, which could expose internal interfaces and ports on the external interface of an affected system. An attacker could exploit this vulnerability by using a TURN server to perform an unauthorized connection to a Call Bridge, a Web Bridge, or a database cluster in an affected system, depending on the deployment model and CMS services in use. A successful exploit could allow the attacker to gain unauthenticated access to a Call Bridge or database cluster in an affected system or gain unauthorized access to sensitive meeting information in an affected system. To exploit this vulnerability, the attacker must have valid credentials for the TURN server of the affected system. This vulnerability affects Cisco Meeting Server (CMS) deployments that are running a CMS Software release prior to Release 2.0.16, 2.1.11, or 2.2.6. Cisco Bug IDs: CSCvf51127.

At a glance

Exploitability

Can be exploited over the network with an admin-level account. High risk of data exposure, data tampering, service disruption.

Exploit odds

3.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-09-13 22:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:02 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.1% in the next 30 days (EPSS).
• Severity: 9.1 CRITICAL (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-09-13 22:29 UTC

Last modified

2026-06-17 01:02 UTC

Exploit probability

3.1% · EPSS, next 30 days

Weakness

CWE-16

Record status

Modified

Affected

• Cisco Meeting Server ≤ 2.0.15
• Cisco Meeting Server 2.1.0
• Cisco Meeting Server 2.1.1
• Cisco Meeting Server 2.1.2
• Cisco Meeting Server 2.1.3
• Cisco Meeting Server 2.1.4
• Cisco Meeting Server 2.1.5
• Cisco Meeting Server 2.1.6

Attack profile CVSS 3.0 · 9.1

Attack vector

Network

Complexity

Low

Privileges needed

High

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2017-12249.md and follow it. Check whether this project is affected by CVE-2017-12249. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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