CVE-2026-26457

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_dump_msg() function when processing COAP messages containing options with zero length.

Published 2026-08-27. Last modified 2026-09-01.