CVE-2023-20209: cisco cisco telepresence video communication server (vcs) expressway Code Injection
Vulnerability summary
CVE-2023-20209 is a high (CVSS 7.2) Code Injection vulnerability in cisco cisco telepresence video communication server (vcs) expressway. EPSS estimates a 40.82% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities.
Timeline
- 16-08-2023PublishedVulnerability first disclosed.
- 16-12-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 2 sources · 1 version- CVE.orgCNA6.5MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:NDiffers
EPSS trend
Probability
40.82%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
0.00 pp
From 40.82% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
- CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
Affected systems
Cisco2 products
- cisco telepresence video communication server (vcs) expresswayX8.5.1 | X8.5.3 | X8.5 | X8.6.1 | X8.6 | X8.1.1 | X8.1.2 | X8.1 | X8.2.1 | X8.2.2 | X8.2 | X8.7.1 | X8.7.2 | X8.7.3 | X8.7 | X8.8.1 | X8.8.2 | X8.8.3 | X8.8 | X8.9.1 | X8.9.2 | X8.9 | X8.10.0 | X8.10.1 | X8.10.2 | X8.10.3 | X8.10.4 | X12.5.8 | X12.5.9 | X12.5.0 | X12.5.2 | X12.5.7 | X12.5.3 | X12.5.4 | X12.5.5 | X12.5.1 | X12.5.6 | X12.6.0 | X12.6.1 | X12.6.2 | X12.6.3 | X12.6.4 | X12.7.0 | X12.7.1 | X8.11.1 | X8.11.2 | X8.11.4 | X8.11.3 | X8.11.0 | X14.0.1 | X14.0.3 | X14.0.2 | X14.0.4 | X14.0.5 | X14.0.6 | X14.0.7 | X14.0.8 | X14.0.9 | X14.0.10 | X14.0.11 | X14.2.1 | X14.2.2 | X14.2.5 | X14.2.6 | X14.2.0 | X14.2.7 | X14.3.0
- telepresence_video_communication_server< 14.3.1
1 vendor · 2 products
References
1 links- sec.cloudapps.cisco.com/security/…Vendor Advisory