Critical Remote Code Execution in Labcenter Electronics Proteus (CVE‑2026‑5495) Out‑Of‑Bounds Write Vulnerability
What It Is — A zero‑day out‑of‑bounds write flaw in the Proteus PDSPRJ file parser allows an attacker to execute arbitrary code in the context of the running process. The vulnerability is tracked as CVE‑2026‑5495 and carries a CVSS 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Exploitability — Exploitation requires the victim to open a malicious .pdsprj file or view a crafted web page that triggers the parser. No public exploit code has been released, but the advisory confirms a functional proof‑of‑concept and that the issue is actively exploitable in the wild.
Affected Products — Labcenter Electronics Proteus (all versions still in production as of the advisory date).
TPRM Impact —
- The vulnerability resides in a design‑automation tool that is often embedded in engineering supply‑chain workflows, creating a potential entry point for attackers targeting downstream manufacturers.
- A successful exploit can lead to execution of malicious payloads on engineering workstations, enabling theft of proprietary schematics, IP, or insertion of back‑doors into firmware produced by the vendor.
Recommended Actions —
- Immediately isolate any systems running Proteus and block the opening of untrusted .pdsprj files.
- Apply any patches or mitigations released by Labcenter Electronics; if none are available, consider rolling back to a pre‑vulnerable version or disabling the PDSPRJ import feature.
- Conduct a focused threat‑hunt on endpoints that have processed PDSPRJ files in the last 90 days for indicators of compromise.
- Update third‑party risk registers to flag Proteus as a high‑risk component and require vendors to provide remediation status.
- Notify affected engineering teams and enforce strict file‑origin verification policies.