Mongoose: Preauth RCE and MTLS Bypass on Devices

Mongoose network library <= 7.20

CVE-2026-5244 - mg_tls_recv_cert pubkey heap-based overflow (exploitable), CVE-2026-5245 - mDNS Record stack-based overflow (exploitable), CVE-2026-5246 - authorization bypass via P-384 Public Key (trivially exploitable)

Fun ride.