CVE-2026-5194 (CVSS 9.5) is a cryptographic signature verification bypass in all wolfSSL releases prior to 5.9.1, allowing forged X.509 certificates to pass ECDSA validation without a legitimate private key, enabling TLS man-in-the-middle attacks and authentication bypass across an estimated 5 billion devices in IoT, embedded, automotive, ICS, and aerospace contexts. wolfSSL 5.9.1, released April 8, 2026, contains the fix, but remediation velocity across vendor firmware and SDK dependency chains will be delayed by weeks to months. Priority actions include inventorying all wolfSSL or CyaSSL deployments via SBOM and asset management records, upgrading to 5.9.1 or later in directly controlled software builds, tracking device-specific vendor firmware advisories, and isolating unpatched internet-facing devices behind TLS-terminating proxies where feasible.