OpenWrt up to 25.12.4 Download session.c fnmatch requested path traversal

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.88

Summaryinfo

A vulnerability, which was classified as problematic, has been found in OpenWrt up to 25.12.4. This affects the function fnmatch of the file session.c of the component Download Handler. Performing a manipulation of the argument requested results in path traversal. This vulnerability is cataloged as CVE-2026-62947. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in OpenWrt up to 25.12.4. This affects the function fnmatch of the file session.c of the component Download Handler. The manipulation of the argument requested with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-23. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-62947 since 07/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 25.12.5 eliminates this vulnerability.

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Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-23 / CWE-22
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenWrt 25.12.5

Timelineinfo

07/15/2026 Advisory disclosed
07/15/2026 +0 days CVE reserved
07/15/2026 +0 days VulDB entry created
07/15/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-62947 (🔒)
GCVE (CVE): GCVE-0-2026-62947
GCVE (VulDB): GCVE-100-379359

Entryinfo

Created: 07/15/2026 20:42
Changes: 07/15/2026 20:42 (55)
Complete: 🔍
Cache ID: 216::103

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