Labcenter Proteus 9 Multiple Memory Corruption Vulnerabilities
First seen Jul 8, 2026 · Updated Jul 8, 2026 · CVSS 7.8
Labcenter Proteus 9 (build 9.1_SP4_Build_42914), an electronic design automation tool used across critical infrastructure sectors, contains three high-severity memory corruption vulnerabilities including an out-of-bounds write, a stack-based buffer overflow, and a use-after-free. Successful exploitation requires local access and user interaction (e.g., opening a crafted file) but could lead to arbitrary code execution or information disclosure. No known public exploitation has been reported, and the vendor has released version 9.2 SPO to address the issues.
Technical Analysis
CVE-2026-42953 (CWE-787, out-of-bounds write) and CVE-2026-49033 (CWE-121, stack-based buffer overflow) both allow arbitrary code execution when a malicious file is parsed by the application, while CVE-2026-42958 (CWE-416, use-after-free) triggers memory corruption during file parsing that could also enable code execution in the context of the current process. All three vulnerabilities carry a CVSS v3.1 score of 7.8 (CVSS v4.0: 8.4) and require local access with user interaction, meaning they are not remotely exploitable but could be delivered via a crafted Proteus project file through phishing or supply-chain-adjacent file sharing. These are engineering/CAD workstation vulnerabilities rather than network-facing services, so exploitation is contingent on social engineering to get a victim to open a malicious file. There is no direct AI agent system impact from this advisory, as Proteus is a standalone EDA desktop application with no indicated integration into LLM tool-use, RAG, or agent orchestration pipelines; however, organizations running AI-assisted engineering workflows or automated file-ingestion agents that process CAD/EDA files should still validate that such automation is not blindly opening untrusted Proteus files, as a file-parsing exploit could compromise any host process (including an agent) that opens it.
Affected Systems
Labcenter Proteus 9, specifically version 9.1_SP4_Build_42914; used in Communications, Critical Manufacturing, Defense Industrial Base, Energy, Healthcare and Public Health, Transportation Systems, and Water and Wastewater sectors worldwide; vendor headquartered in the United Kingdom
Indicators of Compromise
- No specific IOCs published; no known public exploitation reported by CISA at this time
Remediation Steps
- 1
Update to Proteus 9.2 SPO
Upgrade all installations of Labcenter Proteus 9 to version 9.2 SPO or later, verifying the version via the bottom-left of the Proteus home page or the About ISIS/About ARES menu option.
- 2
Restrict file sources
Only open Proteus project files from trusted, verified sources given exploitation requires user interaction with a crafted file.
- 3
Network isolation
Minimize network exposure for control system and engineering workstation devices, ensuring they are not accessible from the internet and are located behind firewalls, separate from business networks.
- 4
Secure remote access
Use VPNs for any required remote access to systems running Proteus, keeping VPN software updated to current versions.
- 5
User awareness training
Train users to avoid clicking unsolicited email links or opening unexpected attachments, reducing risk of social engineering delivery of malicious Proteus files.
- 6
Contact vendor for support
Reach out to Labcenter Electronics or local distributor with questions regarding patching or mitigation.
CVE / Advisory IDs
Industries Most Exposed
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