CVE-2025-66382: libexpat through 2.7.3 (inclusive), 0 through 2.7.5; +4 more affected products

CVE-2025-66382. CVSS 3.1 base score 5.5 (MEDIUM, NVD). EPSS 0.00203 (percentile 0.09554), scored 17-Oct-2026.

Affected technology

libexpat · through 2.7.3 (inclusive)
libexpat project

libexpat · 0 through 2.7.5
libexpat project

RUGGEDCOM RST2428P · 0 to before V4.0
Siemens

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.5 to before *
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.5 to before *
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.5 to before *
Siemens

Description’s affected range: through 2.7.3

Component: Not specified by the source

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

Attack conditions (NVD, CVSS 3.1): Local · No privileges required · User interaction required

What an attacker can do

Vendor/CNA’s CVSS 3.1 assessment (base score 2.9/10) rates confidentiality and integrity impact as none; availability impact as low. NVD’s CVSS 3.1 assessment (base score 5.5/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 19-Oct-2026 14:02 UTC

CWE: CWE-407
CCR priority: 22.1 /100 (P4)
CVSS 3.1: 5.5 /10 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H · NVD
EPSS: 0.00203 · percentile 0.09554 · 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-2025-66382.html