CVE-2026-62947 — OpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-download
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 sess…
Published: 2026-07-15 · CVSS: 4.9 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7