CVE-2026-82989
Deferred Deferred - Pending Action

BaseFortify

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: CERT/CC

Description
There is an input injection in vCast exposed network services in ViewSonic ViewBoard that allows a remote, unauthenticated attacker to inject arbitrary input into service endpoints via network-based HTTP requests to unauthenticated endpoints

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-19
AI Q&A
2026-10-06
EPSS Evaluated
2026-10-18
NVD
CVE-2026-82989
EUVD
EUVD-2026-92873

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Viewsonic vCast v0.0.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
CWE-147 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as input terminators when they are sent to a downstream component.

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Executive Summary

This vulnerability is an input injection flaw in vCast exposed network services in ViewSonic ViewBoard. It allows a remote attacker to send malicious input to unauthenticated service endpoints via HTTP requests without needing authentication.

Detection Guidance

To detect this vulnerability, monitor network traffic for unauthenticated HTTP requests to TCP port 8121 on ViewSonic ViewBoard devices. Check for suspicious APK downloads or file installations originating from unauthenticated endpoints. Use network scanning tools like nmap to identify open ports and services on vCast devices.

Impact Analysis

An attacker could exploit this to manipulate the ViewBoard system, potentially causing unauthorized actions, data breaches, or system disruptions. Since it affects network services, the impact could extend to connected devices or networks.

Compliance Impact

This vulnerability could lead to unauthorized access or data exposure, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Compliance may be compromised if sensitive data is accessed or altered due to the flaw.

Mitigation Strategies

Isolate affected ViewSonic ViewBoard devices from the network to prevent remote exploitation. Disable unauthenticated HTTP endpoints exposed by vCast services if possible. Monitor network traffic for unusual HTTP requests targeting ViewBoard services.

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