CVE-2023-20209

Published Aug 16, 2023 CVSS 3.1 · 6.5 Medium EPSS 39.5% KEV · Not listed

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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco TelePresence Video Communication Server (VCS) Expressway

affected

Version	Status	Constraints
`X8.5.1`	affected	—
`X8.5.3`	affected	—
`X8.5`	affected	—
`X8.6.1`	affected	—
`X8.6`	affected	—
`X8.1.1`	affected	—
`X8.1.2`	affected	—
`X8.1`	affected	—
`X8.2.1`	affected	—
`X8.2.2`	affected	—
`X8.2`	affected	—
`X8.7.1`	affected	—
`X8.7.2`	affected	—
`X8.7.3`	affected	—
`X8.7`	affected	—
`X8.8.1`	affected	—
`X8.8.2`	affected	—
`X8.8.3`	affected	—
`X8.8`	affected	—
`X8.9.1`	affected	—
`X8.9.2`	affected	—
`X8.9`	affected	—
`X8.10.0`	affected	—
`X8.10.1`	affected	—
`X8.10.2`	affected	—
`X8.10.3`	affected	—
`X8.10.4`	affected	—
`X12.5.8`	affected	—
`X12.5.9`	affected	—
`X12.5.0`	affected	—
`X12.5.2`	affected	—
`X12.5.7`	affected	—
`X12.5.3`	affected	—
`X12.5.4`	affected	—
`X12.5.5`	affected	—
`X12.5.1`	affected	—
`X12.5.6`	affected	—
`X12.6.0`	affected	—
`X12.6.1`	affected	—
`X12.6.2`	affected	—
`X12.6.3`	affected	—
`X12.6.4`	affected	—
`X12.7.0`	affected	—
`X12.7.1`	affected	—
`X8.11.1`	affected	—
`X8.11.2`	affected	—
`X8.11.4`	affected	—
`X8.11.3`	affected	—
`X8.11.0`	affected	—
`X14.0.1`	affected	—
`X14.0.3`	affected	—
`X14.0.2`	affected	—
`X14.0.4`	affected	—
`X14.0.5`	affected	—
`X14.0.6`	affected	—
`X14.0.7`	affected	—
`X14.0.8`	affected	—
`X14.0.9`	affected	—
`X14.0.10`	affected	—
`X14.0.11`	affected	—
`X14.2.1`	affected	—
`X14.2.2`	affected	—
`X14.2.5`	affected	—
`X14.2.6`	affected	—
`X14.2.0`	affected	—
`X14.2.7`	affected	—
`X14.3.0`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:cisco:telepresence_video_communication_server::::::::
	cpe:2.3:a:cisco:telepresence_video_communication_server:::::expressway:::*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: 39.5% (39.510% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact total

References

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

History

Dec 17, 2025 5:15 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'No', 'Exploitation': 'PoC', 'Technical Impact': 'Total'}, 'version': '2.0.3'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`