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CVE-2026-62947

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

Description (CNA)

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 (CNA)

Vendor / productVersions
openwrt / openwrtaffected < 25.12.5

CWE

CWE-22

References

ADP enrichment

CISA-ADP

No English description supplied.