# CVE-2023-27978: Deserialization in Custom Reports (RMS16.dll)

> Attackers can achieve remote code execution by tricking users into opening malicious files in IGSS Dashboard or Data Server.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Mar 2023
- **Updated:** 5 Feb 2025
- **Also known as:** GHSA-j943-j589-56x5

## What is CVE-2023-27978?

CVE-2023-27978 is a high-severity unsafe deserialization vulnerability in Schneider Electric Custom Reports (RMS16.dll), published on 21 Mar 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A CWE-502: Deserialization of Untrusted Data vulnerability exists in the Dashboard module that could cause an interpretation of malicious payload data, potentially leading to remote code execution when an attacker gets the user to open a malicious file. Affected Products: IGSS Data Server(IGSSdataServer.exe)(V16.0.0.23040 and prior), IGSS Dashboard(DashBoard.exe)(V16.0.0.23040 and prior), Custom Reports(RMS16.dll)(V16.0.0.23040 and prior).

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2023-27978?

It affects 3 products.


Products: Schneider-Electric Custom Reports, Schneider-Electric Igss Dashboard, Schneider-Electric Igss Data Server.

## How do I fix CVE-2023-27978?

No fix has been published for CVE-2023-27978 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-27978 being exploited?

There is no known exploitation of CVE-2023-27978 in the wild and no public exploit code.

## Other vulnerabilities in Schneider Electric Custom Reports (RMS16.dll)

- [CVE-2023-27980](https://insights.sbomify.com/CVE-2023-27980/): Missing authorization in Custom Reports (RMS16.dll) (high 8.8)
- [CVE-2023-27982](https://insights.sbomify.com/CVE-2023-27982/): Other in Custom Reports (RMS16.dll) (high 8.8)
- [CVE-2023-27981](https://insights.sbomify.com/CVE-2023-27981/): Path traversal in Custom Reports (RMS16.dll) (high 7.8)
- [CVE-2023-27984](https://insights.sbomify.com/CVE-2023-27984/): Code injection in Custom Reports (RMS16.dll) (high 7.8)
- [CVE-2023-27977](https://insights.sbomify.com/CVE-2023-27977/): Other in Custom Reports (RMS16.dll) (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-27978 and fix it if it is affected.

What it is: CVE-2023-27978 is a high-severity unsafe deserialization vulnerability in Schneider Electric Custom Reports (RMS16.dll), published on 21 Mar 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-27978 in the wild and no public exploit code.

Affected product: Schneider Electric Custom Reports (RMS16.dll). 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-2023-27978/ (Markdown: https://insights.sbomify.com/CVE-2023-27978/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-27978
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-27978
- OSV: https://osv.dev/vulnerability/CVE-2023-27978

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-27978/
Summaries are generated and may contain mistakes; the official description above is the record.