Vulnerability identifier: #VU56028

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-34715

CWE-ID: CWE-347

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Expressway
Server applications / Conferencing, Collaboration and VoIP solutions
Cisco TelePresence Video Communication Server
Server applications / Other server solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote user to compromise the target system.

The vulnerability exists due to insufficient validation of the content of upgrade packages. A remote administrator can upload a malicious archive to the Upgrade page and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Expressway: X8.8

Cisco TelePresence Video Communication Server: X8.8

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewver-c6WZPXRx

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.