# CVE-2025-54849: Denial of service in DIRIS Digiware M-70

> An unauthenticated attacker can cause a denial of service on Socomec DIRIS Digiware M-70 devices by sending a specific Modbus TCP message.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Dec 2025
- **Updated:** 1 Dec 2025
- **Also known as:** GHSA-4x83-3vjm-fc98

## What is CVE-2025-54849?

CVE-2025-54849 is a high-severity denial of service vulnerability in Socomec DIRIS Digiware M-70, published on 1 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP functionality of Socomec DIRIS Digiware M-70 1.6.9. A specially crafted series of network requests can lead to a denial of service. An attacker can send a sequence of unauthenticated packets to trigger this vulnerability.An attacker can trigger this denial-of-service condition by sending a single Modbus TCP message to port 502 using the Write Single Register function code (6) to write the value 1 to register 4352. This action changes the Modbus address to 15. After this message is sent, the device will be in a denial-of-service state.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2025-54849?

It affects 1 product.


Products: Socomec Diris Digiware M-70 Firmware.

## How do I fix CVE-2025-54849?

No fix has been published for CVE-2025-54849 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-54849 being exploited?

There is no known exploitation of CVE-2025-54849 in the wild and no public exploit code.

## Other vulnerabilities in Socomec DIRIS Digiware M-70

- [CVE-2025-54848](https://insights.sbomify.com/CVE-2025-54848/): Denial of service in DIRIS Digiware M-70 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-54849 and fix it if it is affected.

What it is: CVE-2025-54849 is a high-severity denial of service vulnerability in Socomec DIRIS Digiware M-70, published on 1 Dec 2025. 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-2025-54849 in the wild and no public exploit code.

Affected product: Socomec DIRIS Digiware M-70. 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-2025-54849/ (Markdown: https://insights.sbomify.com/CVE-2025-54849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-54849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-54849
- OSV: https://osv.dev/vulnerability/CVE-2025-54849

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-54849/
Summaries are generated and may contain mistakes; the official description above is the record.