What is the vulnerability ID?

The vulnerability ID is CVE-2022-20812.

What is the severity of CVE-2022-20812?

The severity of CVE-2022-20812 is critical.

What software is affected by CVE-2022-20812?

Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) versions up to exclusive x14.0.7 are affected by CVE-2022-20812.

Are there any references for CVE-2022-20812?

Yes, you can find more information on CVE-2022-20812 at the following URLs: [Cisco Security Advisory](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-csrf-sqpsSfY6) and [Cisco Security Advisory](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-overwrite-3buqW8LH).

Vulnerability/
CVE-2022-20812

critical

CWE

22 158

6/7/2022

6/11/2024

CVE-2022-20812: Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities

Q: What can a remote attacker do with CVE-2022-20812?

A remote attacker can overwrite arbitrary files or conduct null byte poisoning attacks on an affected device.

First published: Wed Jul 06 2022(Updated: )

Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Expressway	<x14.0.7
Cisco TelePresence Video Communication Server	<x14.0.7

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Frequently Asked Questions

What is the vulnerability ID?
The vulnerability ID is CVE-2022-20812.
What is the severity of CVE-2022-20812?
The severity of CVE-2022-20812 is critical.
What software is affected by CVE-2022-20812?
Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) versions up to exclusive x14.0.7 are affected by CVE-2022-20812.
What can a remote attacker do with CVE-2022-20812?
A remote attacker can overwrite arbitrary files or conduct null byte poisoning attacks on an affected device.
Are there any references for CVE-2022-20812?
Yes, you can find more information on CVE-2022-20812 at the following URLs: [Cisco Security Advisory](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-csrf-sqpsSfY6) and [Cisco Security Advisory](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-overwrite-3buqW8LH).

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