# CVE-2026-100902: Barco ClickShare CX-20 Gen2 Wallpaper Upload wallpaper improper validation of syntactic correctness of input

> Remote attackers can exploit improper input validation in the wallpaper upload feature to potentially execute code or escalate privileges on Barco ClickShare devices.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Sep 2026
- **Updated:** 28 Sep 2026
- **Also known as:** GHSA-q2rq-5hf8-g6jh

## What is CVE-2026-100902?

CVE-2026-100902 is a high-severity vulnerability in Barco ClickShare CX-20 Gen2, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was determined in Barco ClickShare CX-20 Gen2 up to 02.26.00.0007. Affected by this issue is some unknown functionality of the file /wallpaper of the component Wallpaper Upload. This manipulation of the argument wallpaper causes improper validation of syntactic correctness of input. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-20 (Improper Input Validation), CWE-1286 (Improper Validation of Syntactic Correctness of Input)

## Which versions are affected by CVE-2026-100902?


## How do I fix CVE-2026-100902?

No fix has been published for CVE-2026-100902 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-100902 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100902 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100902 and fix it if it is affected.

What it is: CVE-2026-100902 is a high-severity vulnerability in Barco ClickShare CX-20 Gen2, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100902 exists.

Affected product: Barco ClickShare CX-20 Gen2. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-100902/ (Markdown: https://insights.sbomify.com/CVE-2026-100902/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100902
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100902
- OSV: https://osv.dev/vulnerability/CVE-2026-100902

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-100902/
Summaries are generated and may contain mistakes; the official description above is the record.