# CVE-2024-45386: Auth bypass in SIMATIC PCS neo V4.0

> Attackers can reuse session tokens after logout to hijack legitimate user sessions in Siemens industrial automation products.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Feb 2025
- **Updated:** 11 Feb 2025
- **Also known as:** GHSA-4688-8pmg-jw5w

## What is CVE-2024-45386?

CVE-2024-45386 is a high-severity authentication bypass vulnerability in Siemens SIMATIC PCS neo V4.0, published on 11 Feb 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in SIMATIC PCS neo V4.0 (All versions), SIMATIC PCS neo V4.1 (All versions < V4.1 Update 2), SIMATIC PCS neo V5.0 (All versions < V5.0 Update 1), SIMOCODE ES V19 (All versions < V19 Update 1), SIRIUS Safety ES V19 (TIA Portal) (All versions < V19 Update 1), SIRIUS Soft Starter ES V19 (TIA Portal) (All versions < V19 Update 1), TIA Administrator (All versions < V3.0.4). Affected products do not correctly invalidate user sessions upon user logout. This could allow a remote unauthenticated attacker, who has obtained the session token by other means, to re-use a legitimate user's session even after logout.

Weakness: CWE-613 (DEPRECATED: Insufficient Session Expiration)

## Which versions are affected by CVE-2024-45386?


## How do I fix CVE-2024-45386?

No fix has been published for CVE-2024-45386 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-45386 being exploited?

There is no known exploitation of CVE-2024-45386 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-45386 and fix it if it is affected.

What it is: CVE-2024-45386 is a high-severity authentication bypass vulnerability in Siemens SIMATIC PCS neo V4.0, published on 11 Feb 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-45386 in the wild and no public exploit code.

Affected product: Siemens SIMATIC PCS neo V4.0. 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-2024-45386/ (Markdown: https://insights.sbomify.com/CVE-2024-45386/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-45386
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-45386
- OSV: https://osv.dev/vulnerability/CVE-2024-45386

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-45386/
Summaries are generated and may contain mistakes; the official description above is the record.