CVE-2026-26457CWE-476

CVE-2026-26457

High · published August 27, 2026

CVSS v3.1

7.5

EPSS

Percentile

41.1

In the wild

Unconfirmed

What it is

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

The record

Technical detail

CVSS v3.1: 7.5 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00488 · 41.1th percentile
Weakness: CWE-476 · NULL Pointer Dereference
Published: 2026-08-27T21:17Z

References (3)

https://github.com/ipflavors/ccoap · [email protected]https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT2.md · [email protected]https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT2.md · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

27 AUG 00:00Z
ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_dump_msg() function when processing COAP messages…
cvelistv5