CVE-2026-62947
Low
No strong exploitation signal.
CVSS base
4.9
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
EPSS — probability of exploitation (30 days)
0.5%
43.2th percentile
CISA KEV
Not listed
Weakness / dates
CWE-22
Published 2026-07-15 · modified 2026-07-21
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | H | High |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | N | None |
| Availability | N | None |
Timeline
- 2026-07-15 — Published (NVD)
- 2026-07-21 — Last modified (NVD)
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.
Affected
References
- https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4
- https://github.com/openwrt/cgi-io/pull/4
- https://github.com/openwrt/openwrt/releases/tag/v25.12.5
- exploit https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq
- exploit https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq