# CVE-2020-7586: Memory corruption in SIMATIC PCS 7 V8.2 and earlier

> A local attacker can exploit a buffer overflow in Siemens industrial software to cause denial of service and access confidential information.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-wggc-468x-3c9v

## What is CVE-2020-7586?

CVE-2020-7586 is a high-severity memory corruption vulnerability in Siemens SIMATIC PCS 7 V8.2 and earlier, published on 10 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3), SIMATIC PDM (All versions < V9.2), SIMATIC STEP 7 V5.X (All versions < V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 HF2). A buffer overflow vulnerability could allow a local attacker to cause a Denial-of-Service situation. The security vulnerability could be exploited by an attacker with local access to the affected systems. Successful exploitation requires user privileges but no user interaction. The vulnerability could allow an attacker to compromise the availability of the system as well as to have access to confidential information.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2020-7586?

It affects 4 products.


Products: Siemens Simatic Pcs 7, Siemens Simatic Process Device Manager, Siemens Simatic Step 7, Siemens Sinamics Starter.

## How do I fix CVE-2020-7586?

No fix has been published for CVE-2020-7586 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7586 being exploited?

There is no known exploitation of CVE-2020-7586 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SIMATIC PCS 7 V8.2 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-2020-7586 and fix it if it is affected.

What it is: CVE-2020-7586 is a high-severity memory corruption vulnerability in Siemens SIMATIC PCS 7 V8.2 and earlier, published on 10 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-7586 in the wild and no public exploit code.

Affected product: Siemens SIMATIC PCS 7 V8.2 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-2020-7586/ (Markdown: https://insights.sbomify.com/CVE-2020-7586/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7586
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7586
- OSV: https://osv.dev/vulnerability/CVE-2020-7586

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7586/
Summaries are generated and may contain mistakes; the official description above is the record.