CVE-2021-42023

A vulnerability has been identified in ModelSim Simulation (All versions), Questa Simulation (All versions). The RSA white-box implementation in affected applications insufficiently protects the built-in private keys that are required to decrypt electronic intellectual property (IP) data in accordance with the IEEE 1735 recommended practice. This could allow a sophisticated attacker to discover the keys, bypassing the protection intended by the IEEE 1735 recommended practice.

• CWE-522

• https://cert-portal.siemens.com/productcert/pdf/ssa-400332.pdfPatch, Vendor Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-400332.pdfPatch, Vendor Advisory

Published

Dec 14, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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