Vulnerabilities CVE-2026-62947

CVE-2026-62947

Medium

Open

TLP:CLEAR

OpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-download

NVD CVE.org

Critical Infrastructure

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Description

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch() without FNM_PATHNAME, allowing traversal such as an allowed wildcard prefix followed by ../ to read root-readable files including /etc/shadow. This vulnerability is fixed in 25.12.5.

Details

CVSS Score: 4.9
EPSS Score ⓘ: 0.40%

33th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Confidence: 90%
Published: Jul 15, 2026
Last Modified: Jul 15, 2026

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