# CVE-2026-59086: Siemens Simcenter stack overflow in argument parsing

Source: https://junglewise.ai/threats/cve-2026-59086-siemens-simcenter-stack-overflow-in-argument-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-59086 · Severity: high · CVSS 7.8 · Published 2026-08-11

Simcenter Femap and Simcenter Nastran are widely-used simulation and finite element analysis tools used by engineers to design and analyze complex products. A stack overflow vulnerability in these applications allows attackers to execute arbitrary code if a user runs the application with a specially crafted string argument. An attacker could exploit this to gain full control over engineering workstations and compromise sensitive design data.

Technologies: [Siemens Simcenter Femap](https://junglewise.ai/threats/technologies/simcenter-femap). Vendors: [Siemens](https://junglewise.ai/threats/vendors/siemens).

## Quick answers

**Is CVE-2026-59086 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-59086 being exploited in the wild.

**How severe is CVE-2026-59086?** High severity, with a CVSS score of 7.8, published 11 August 2026.

**Which products and versions are affected?** Siemens Simcenter Femap < V2606; Siemens Simcenter Nastran < V2606.

**Is there a fix for CVE-2026-59086?** A patch was published on 2026-08-11: Updates to V2606 available for both products Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-59086 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-59086?** Check whether you run Siemens Simcenter Femap or Siemens Simcenter Nastran at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow vulnerability (CWE-121) exists in both Simcenter Femap and Simcenter Nastran where an application binary improperly parses specially crafted strings passed as file arguments, leading to stack memory corruption. The vulnerability requires local access and user interaction—an attacker must trick a user into running the application with a malicious string argument. Successful exploitation allows remote code execution with the privileges of the current process, potentially compromising design data and system integrity. Patches are available: both products should be updated to V2606 or later.

## Affected products

- Siemens Simcenter Femap < V2606
- Siemens Simcenter Nastran < V2606

## Timeline

- 2026-08-11: disclosed
- 2026-08-11: patched: Updates to V2606 available for both products

## References

- [https://cert-portal.siemens.com/productcert/html/ssa-069220.html](https://cert-portal.siemens.com/productcert/html/ssa-069220.html)

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