# CVE-2020-15782: Memory corruption in SIMATIC Drive Controller family

> Remote unauthenticated attackers can bypass memory protection to write arbitrary code or read sensitive data on Siemens industrial controllers.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 28 May 2021
- **Updated:** 2 Jun 2026
- **Also known as:** GHSA-jx94-83cv-56j7

## What is CVE-2020-15782?

CVE-2020-15782 is a critical memory corruption vulnerability in Siemens SIMATIC Drive Controller family, published on 28 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.5.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.9.2), SIMATIC S7-1500 Software Controller (All versions < V21.9), SIMATIC S7-PLCSIM Advanced (All versions < V4.0), SINAMICS PERFECT HARMONY GH180 Drives (Drives manufactured before 2021-08-13), SINUMERIK MC (All versions < V6.15), SINUMERIK ONE (All versions < V6.15). Affected devices are vulnerable to a memory protection bypass through a specific operation. A remote unauthenticated attacker with network access to port 102/tcp could potentially write arbitrary data and code to protected memory areas or read sensitive data to launch further attacks.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2020-15782?

It affects 6 products.


Products: Siemens Et 200sp Open Controller Firmware, Siemens S7-1200 Cpu Firmware, Siemens S7-1500 Cpu Firmware, Siemens Simatic Driver Controller Firmware, Siemens Simatic S7-1500  Software Controller, Siemens Simatic S7-Plcsim Advanced.

## How do I fix CVE-2020-15782?

No fix has been published for CVE-2020-15782 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-15782 being exploited?

There is no known exploitation of CVE-2020-15782 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-15782 and fix it if it is affected.

What it is: CVE-2020-15782 is a critical memory corruption vulnerability in Siemens SIMATIC Drive Controller family, published on 28 May 2021. 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-2020-15782 in the wild and no public exploit code.

Affected product: Siemens SIMATIC Drive Controller family. 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-2020-15782/ (Markdown: https://insights.sbomify.com/CVE-2020-15782/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15782
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15782
- OSV: https://osv.dev/vulnerability/CVE-2020-15782

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-15782/
Summaries are generated and may contain mistakes; the official description above is the record.