CVE-2021-34715 MEDIUM

CVE-2021-34715: Cisco Expressway Series and TelePresence Video Communication Server Image Verification Vulnerability

Vendor Cisco
Product Cisco TelePresence Video Communication Server (VCS) Expressway
Weakness CWE-347
Published August 18, 2021
Last update November 7, 2024

CVSS base score

4.7/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

What the vulnerability does

01Description

A vulnerability in the image verification function of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute code with internal user privileges on the underlying operating system. The vulnerability is due to insufficient validation of the content of upgrade packages. An attacker could exploit this vulnerability by uploading a malicious archive to the Upgrade page of the administrative web interface. A successful exploit could allow the attacker to execute code with user-level privileges (the _nobody account) on the underlying operating system.

Key dates

02Disclosure timeline

August 18, 2021 CVE published
November 7, 2024 Record updated