What’s Vulnerable › Vulnerabilities

CVE-2023-20209

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 39.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-16 · updated 2026-06-17
• Weakness: CWE-94

Description

A vulnerability in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker with read-write privileges on the application to perform a command injection attack that could result in remote code execution on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to establish a remote shell with root privileges.

Affected products

• Cisco TelePresence Video Communication Server (VCS) Expressway: before 14.3.1 — fixed in 14.3.1

How to fix

Upgrade to a fixed version: Cisco TelePresence Video Communication Server (VCS) Expressway 14.3.1. Check the vendor advisory for mitigations.

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-injection-X475EbTQ
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-injection-X475EbTQ

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