VU#756733: Calix GS7 XGS GS5239XG residential router contains missing authentication vulnerability

CERT/CC advisories describe multiple 2026 vulnerabilities affecting residential routers, broadband gateway WebUIs, TPM 2.0 reference code, OpenCart, the stb TrueType library, SOGo, and VPS.org deployment templates. Impacts include unauthenticated administrative access, NAT/firewall bypass, authentication bypass, denial of service, information disclosure, cryptographic key compromise, arbitrary code execution, XSS-driven mailbox compromise, and exposure of services through default credentials and insecure network bindings. Several issues lack vendor patches; affected systems should be upgraded,