CVE-2021-40122

MEDIUM

Cisco Meeting Server < 3.1 - Unauthenticated Denial of Service via Call Bridge API

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.9
EPSS 0.0038
EPSS Percentile 59.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-399 CWE-404
Status published
Products (1)
cisco/meeting_server < 3.1
Published Oct 21, 2021
Tracked Since Feb 18, 2026