CVE-2025-59391: libcoap before 4.3.5a (exclusive); +1 more affected products

CVE-2025-59391. CVSS 3.1 base score 6.5 (MEDIUM, Source advisory). EPSS 0.00261 (percentile 0.16597), scored 17-Oct-2026.

Affected technology

libcoap · before 4.3.5a (exclusive)
libcoap

n/a · n/a
Vendor not specified by the source

Description’s affected range: before release-4.3.5-patches

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source says an out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. Source advisory’s CVSS 3.1 assessment (base score 6.5/10) rates confidentiality and availability impact as low; integrity impact as none.

Published 19-Oct-2026 14:02 UTC

CWE: CWE-125
CCR priority: 26.1 /100 (P4)
CVSS 3.1: 6.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L · Source advisory
EPSS: 0.00261 · percentile 0.16597 · 2026-10-17
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-19 14:02:10.907757+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-59391.html