CVE-2026-62947
OpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-download
CVSS Score
4.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | openwrt |
| Product | openwrt |
| Published | Jul 15, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
openwrt / openwrt
< 25.12.5
References
github.com: https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq github.com: https://github.com/openwrt/cgi-io/pull/4 github.com: https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4 github.com: https://github.com/openwrt/openwrt/releases/tag/v25.12.5