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CVE-2026-62947

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

Published: Jul 15, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-22
4.9MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 67.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-22

Affected Products

openwrt
oss-project·DEaka lede
openwrtEmbeddedOS
Operating Systems / linux-distro

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4
github.com
https://github.com/openwrt/cgi-io/pull/4
github.com
https://github.com/openwrt/openwrt/releases/tag/v25.12.5
github.com
and 1 more references View all →
News mentions
2

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