CVE-2023-20209
A vulnerability in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an...
- Published
- Aug 16, 2023
- Updated
- Dec 16, 2025
- Assigning CNA
- cisco
- Evidence observed
- Aug 4, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 98.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- CVE-2023-20209Exploit
Detailed technical analysis and proof-of-concept exploit for CVE-2023-20209, a post-authentication remote code execution vulnerability in Cisco Expressway, with step-by-step code flow walkthrough and exploitation notes.
Responsible use
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