# CVE-2025-40805: Auth bypass in Industrial Edge Cloud Device (IECD)

> Unauthenticated attackers can bypass authentication on specific API endpoints to impersonate legitimate users if they know the user identity.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Jan 2026
- **Updated:** 12 May 2026
- **Also known as:** GHSA-8gqp-3rhh-936h

## What is CVE-2025-40805?

CVE-2025-40805 is a critical authentication bypass vulnerability in Siemens Industrial Edge Cloud Device (IECD), published on 13 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Affected devices do not properly enforce user authentication on specific API endpoints. This could facilitate an unauthenticated remote attacker to circumvent authentication and impersonate a legitimate user. Successful exploitation requires that the attacker has learned the identity of a legitimate user.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2025-40805?


## How do I fix CVE-2025-40805?

No fix has been published for CVE-2025-40805 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40805 being exploited?

There is no known exploitation of CVE-2025-40805 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40805 and fix it if it is affected.

What it is: CVE-2025-40805 is a critical authentication bypass vulnerability in Siemens Industrial Edge Cloud Device (IECD), published on 13 Jan 2026. 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-2025-40805 in the wild and no public exploit code.

Affected product: Siemens Industrial Edge Cloud Device (IECD). 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-2025-40805/ (Markdown: https://insights.sbomify.com/CVE-2025-40805/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40805
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40805
- OSV: https://osv.dev/vulnerability/CVE-2025-40805

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-40805/
Summaries are generated and may contain mistakes; the official description above is the record.