# CVE-2026-5495: Labcenter Electronics Proteus out-of-bounds write in PDSPRJ parsing

Source: https://junglewise.ai/threats/cve-2026-5495-labcenter-electronics-proteus-out-of-bounds-write-in-pdsprj  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-11. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2026-5495 · Severity: high · CVSS 7.8 · Published 2026-04-11

Labcenter Electronics Proteus, a software suite used for electronic design automation and circuit simulation, contains a vulnerability in how it handles project files. An attacker could trick a user into opening a specially crafted project file, allowing the attacker to take control of the user's computer and execute malicious software. This could lead to the theft of intellectual property, data loss, or unauthorized access to the corporate network.

Technologies: [Labcenter Proteus](https://junglewise.ai/threats/technologies/proteus). Vendors: [Labcenter](https://junglewise.ai/threats/vendors/labcenter).

## Quick answers

**Is CVE-2026-5495 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-5495 being exploited in the wild.

**How severe is CVE-2026-5495?** High severity, with a CVSS score of 7.8, published 11 April 2026.

**Which products and versions are affected?** Labcenter Electronics Proteus 8.17 SP5.

**Is there a fix for CVE-2026-5495?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-5495 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-5495?** Check whether you run Labcenter Proteus. 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

An out-of-bounds write vulnerability (CWE-787) exists in Labcenter Electronics Proteus during the parsing of PDSPRJ files. The root cause is a lack of proper validation of user-supplied data within the file structure, leading to a write operation past the end of an allocated buffer. While the attack vector is categorized as local because it requires the user to open a file, it effectively allows remote code execution in the context of the current process if a victim is enticed to open a malicious project file or visit a malicious page. The vendor has indicated the software is no longer in production, and no official patch is available; users are advised to restrict interaction with the product.

## Affected products

- Labcenter Electronics Proteus 8.17 SP5

## Timeline

- 2025-04-14: disclosed: Vulnerability reported to vendor by ZDI
- 2026-04-06: advisory: ZDI published zero-day advisory
- 2026-04-11: other: CVE published to NVD

## References

- [https://www.zerodayinitiative.com/advisories/ZDI-26-257/](https://www.zerodayinitiative.com/advisories/ZDI-26-257/)

## Related threats

- [Labcenter Electronics Proteus type confusion in PDSPRJ parsing](https://junglewise.ai/threats/cve-2026-5496-labcenter-electronics-proteus-type-confusion-in-pdsprj-parsing)
- [Labcenter Electronics Proteus out-of-bounds write in PDSPRJ parsing](https://junglewise.ai/threats/cve-2026-5494-labcenter-electronics-proteus-out-of-bounds-write-in-pdsprj)
- [Labcenter Electronics Proteus out-of-bounds write in PDSPRJ parsing](https://junglewise.ai/threats/cve-2026-5493-labcenter-electronics-proteus-out-of-bounds-write-in-pdsprj)