CVE-2026-55687: esp-idf >= 6.0.0, < 6.0.2, >= 5.5.0, <= 5.5.4, >= 5.4.0, <= 5.4.4, <= 5.3.5

CVE-2026-55687. CVSS 3.1 base score 7.5 (HIGH, Vendor/CNA). EPSS 0.007 (percentile 0.52686), scored 24-Oct-2026.

Affected technology

esp-idf · >= 6.0.0, < 6.0.2, >= 5.5.0, <= 5.5.4, >= 5.4.0, <= 5.4.4, <= 5.3.5
espressif

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source reports that an attacker could disrupt service. Vendor/CNA’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 25-Oct-2026 19:51 UTC

CWE: CWE-121, CWE-787
CCR priority: 30.2 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
EPSS: 0.007 · percentile 0.52896 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-55687.html