SEPTEMBER 18, 2026
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Case File

CVE-2026-26453

HIGH · CVSS 7.5 EPSS 0.34% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-27 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

The vulnerability affects F5 products utilizing the ccoap library, specifically in the coap_server_handle_session() function, where a null pointer dereference occurs when processing COAP messages with URI_PATH options containing NULL data pointers. This flaw can lead to a segmentation fault, potentially causing service disruptions. Organizations using affected F5 products should prioritize remediation to prevent potential denial-of-service scenarios.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-26453
Severity
HIGH
CVSS
7.5
EPSS
0.34%
F5

Original NVD Description

ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_server_handle_session() function when processing COAP messages containing URI_PATH options with NULL data pointers. When the server searches for a URI_PATH option matching the string "separate", it directly calls strncmp() on option_list[i].data without checking if the pointer is NULL. This causes a segmentation fault when the option's data field is NULL.