---
id: "CVE-2026-82987"
kind: "vulnerability"
aliases: ["CVE-2026-82987"]
title: "ViewSonic ViewBoard vCast: unauthenticated endpoint leaks live screen captures"
severity: "high"
cvss: null
epss: 0.00287
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "iot", "self-hosted", "viewboard", "viewsonic"]
not_affected_if: ["isolated-network", "no-vcast-service"]
published_at: "2026-10-21T21:19:17+00:00"
first_seen_at: "2026-10-23T21:57:29+00:00"
updated_at: "2026-10-25T05:02:01+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82987", "first_seen_at": "2026-10-23T21:57:29+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-82987", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# ViewSonic ViewBoard vCast: unauthenticated endpoint leaks live screen captures

The vCast media streaming service on ViewSonic ViewBoard interactive displays exposes a /snapshot or /screen endpoint that returns JPEG captures without authentication. A remote attacker can fetch the current screen contents and exfiltrate whatever is on the display.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the ViewBoard display's vCast service is reachable from your network on its listening port, using a request to `/snapshot` or `/screen` and confirming a JPEG comes back.
- Confirm the exact ViewBoard firmware and vCast version in use; the sources do not list affected versions, so this is unknown.

## Fix

- unknown. The sources do not name a fixed firmware or vCast version; check the ViewSonic advisory for ViewBoard firmware updates.
- Until a patch is applied, block external access to the ViewBoard's vCast port at the network edge.

## Timeline

- 2026-10-23T21:57:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-82987
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-82987

## From the sources

There exists a screen capture endpoint in vCast media streaming service in ViewSonic ViewBoard unknown allows a remote, unauthenticated attacker to capture and exfiltrate the current screen content via GET requests to an unauthenticated /snapshot or /screen endpoint returning JPEGs

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_