Vulnerability · Published Oct 21, 2021 · Assigned by cisco

CVE-2021-40122Cisco Meeting Server Call Bridge Denial of Service Vulnerability

Medium 5.9

In plain English

A medium-severity security flaw in Cisco Meeting Server from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)1.2%top 32.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in an API of the Call Bridge feature of Cisco Meeting Server could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper handling of large series of message requests. An attacker could exploit this vulnerability by sending a series of messages to the vulnerable API. A successful exploit could allow the attacker to cause the affected device to reload, dropping all ongoing calls and resulting in a DoS condition.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Meeting Server	n/a

Weakness: CWE-399 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

20211020 Cisco Meeting Server Call Bridge Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO