---
id: CVE-2026-82989
title: >-
  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 endpo…
summary: >-
  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 endpo…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-74
  - CWE-147
vendor: Viewsonic
product: vCast
affected:
  - vCast >= v0.0.0 <= v3.2.715
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:03:59.427'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82989'
references:
  - url: 'https://blog.l3afs.space/posts/Vcast-Viewsonic-RCE-chain/'
    label: cret@cert.org
  - url: 'https://kb.cert.org/vuls/id/234131'
    label: cret@cert.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-06T14:06:46.321838Z'
ingestedAt: '2026-10-05T23:36:21.188Z'
epss: 0.00666
epssPercentile: 0.51637
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.