# CVE-2019-10935: File upload in SIMATIC PCS 7 V8.0 and earlier

> An authenticated attacker can upload arbitrary ASPX code to the WinCC DataMonitor web application, leading to remote code execution and full system compromise.

- **Severity:** High 7.2 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jul 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3hg6-vvm5-64f6

## What is CVE-2019-10935?

CVE-2019-10935 is a high-severity vulnerability in Siemens AG SIMATIC PCS 7 V8.0 and earlier, published on 11 Jul 2019. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability has been identified in SIMATIC PCS 7 V8.0 and earlier (All versions), SIMATIC PCS 7 V8.1 (All versions < V8.1 with WinCC V7.3 Upd 19), SIMATIC PCS 7 V8.2 (All versions < V8.2 SP1 with WinCC V7.4 SP1 Upd 11), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP2 with WinCC V7.4 SP1 Upd11), SIMATIC WinCC Professional (TIA Portal V13) (All versions), SIMATIC WinCC Professional (TIA Portal V14) (All versions < V14 SP1 Upd 9), SIMATIC WinCC Professional (TIA Portal V15) (All versions < V15.1 Upd 3), SIMATIC WinCC Runtime Professional V13 (All versions), SIMATIC WinCC Runtime Professional V14 (All versions < V14.1 Upd 8), SIMATIC WinCC Runtime Professional V15 (All versions < V15.1 Upd 3), SIMATIC WinCC V7.2 and earlier (All versions), SIMATIC WinCC V7.3 (All versions < V7.3 Upd 19), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Upd 11), SIMATIC WinCC V7.5 (All versions < V7.5 Upd 3). The SIMATIC WinCC DataMonitor web application of the affected products allows to upload arbitrary ASPX code. The security vulnerability could be exploited by an authenticated attacker with network access to the WinCC DataMonitor application. No user interaction is required to exploit this vulnerability. The vulnerability impacts confidentiality, integrity, and availability of the affected device. At the stage of publishing this security advisory no public exploitation is known.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2019-10935?

It affects 3 products.


Products: Siemens Simatic Pcs 7, Siemens Simatic Wincc, Siemens Simatic Wincc Runtime.

## How do I fix CVE-2019-10935?

No fix has been published for CVE-2019-10935 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-10935 being exploited?

There is no known exploitation of CVE-2019-10935 in the wild and no public exploit code.

## Other vulnerabilities in Siemens AG SIMATIC PCS 7 V8.0 and earlier

- [CVE-2023-25910](https://insights.sbomify.com/CVE-2023-25910/): Code injection in SIMATIC PCS 7 (critical 10.0)
- [CVE-2021-40358](https://insights.sbomify.com/CVE-2021-40358/): Path traversal in SIMATIC PCS 7 V8.2 (critical 9.9)
- [CVE-2019-10922](https://insights.sbomify.com/CVE-2019-10922/): Auth bypass in SIMATIC PCS 7 V8.0 and earlier (critical 9.8)
- [CVE-2021-40360](https://insights.sbomify.com/CVE-2021-40360/): Information disclosure in SIMATIC PCS 7 V8.2 (high 8.8)
- [CVE-2019-10916](https://insights.sbomify.com/CVE-2019-10916/): SQL injection in SIMATIC PCS 7 V8.0 and earlier (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10935 and fix it if it is affected.

What it is: CVE-2019-10935 is a high-severity vulnerability in Siemens AG SIMATIC PCS 7 V8.0 and earlier, published on 11 Jul 2019. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-10935 in the wild and no public exploit code.

Affected product: Siemens AG SIMATIC PCS 7 V8.0 and earlier. 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-2019-10935/ (Markdown: https://insights.sbomify.com/CVE-2019-10935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10935
- OSV: https://osv.dev/vulnerability/CVE-2019-10935

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-10935/
Summaries are generated and may contain mistakes; the official description above is the record.