# CVE-2021-27656: exacqVision Web Services - Information Exposure

> Unauthenticated attackers can view sensitive system-level information about the exacqVision Web Service and operating system.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Mar 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-4v7v-2c44-w644

## What is CVE-2021-27656?

CVE-2021-27656 is a medium-severity vulnerability in Johnson Controls exacqVision Web Service version 20.12.2.0 and prior, published on 18 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in exacqVision Web Service 20.12.2.0 and prior could allow an unauthenticated attacker to view system-level information about the exacqVision Web Service and the operating system.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2021-27656?

It affects 1 product.


Products: Johnsoncontrols Exacqvision Web Service.

## How do I fix CVE-2021-27656?

No fix has been published for CVE-2021-27656 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27656 being exploited?

There is no known exploitation of CVE-2021-27656 in the wild and no public exploit code.

## Other vulnerabilities in Johnson Controls exacqVision Web Service version 20.12.2.0 and prior

- [CVE-2021-27664](https://insights.sbomify.com/CVE-2021-27664/): exacqVision Web Service (critical 9.8)
- [CVE-2024-32862](https://insights.sbomify.com/CVE-2024-32862/): exacqVision CORS (medium 6.8)
- [CVE-2024-32863](https://insights.sbomify.com/CVE-2024-32863/): exacqVison - CSRF issues with Web Service (medium 6.8)
- [CVE-2024-32864](https://insights.sbomify.com/CVE-2024-32864/): exacqVison - HTTPS Session Establishment (medium 6.4)
- [CVE-2024-32931](https://insights.sbomify.com/CVE-2024-32931/): exacqVison - Token Disclosed in URL (medium 5.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27656 and fix it if it is affected.

What it is: CVE-2021-27656 is a medium-severity vulnerability in Johnson Controls exacqVision Web Service version 20.12.2.0 and prior, published on 18 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27656 in the wild and no public exploit code.

Affected product: Johnson Controls exacqVision Web Service version 20.12.2.0 and prior. 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-2021-27656/ (Markdown: https://insights.sbomify.com/CVE-2021-27656/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27656
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27656
- OSV: https://osv.dev/vulnerability/CVE-2021-27656

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-27656/
Summaries are generated and may contain mistakes; the official description above is the record.