CVE-2026-62947

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.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4	Patch
https://github.com/openwrt/cgi-io/pull/4	Issue Tracking Patch
https://github.com/openwrt/openwrt/releases/tag/v25.12.5	Release Notes
https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq	Vendor Advisory Exploit
https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq	Vendor Advisory Exploit

Configurations

Configuration 1 (hide)

cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-15 19:18

Updated : 2026-07-21 16:06

NVD link : CVE-2026-62947

Mitre link : CVE-2026-62947

CVE.ORG link : CVE-2026-62947

JSON object : View

Products Affected

openwrt

openwrt

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

{"id": "CVE-2026-62947", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-62947", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-15T19:31:15.364055Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.2}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "openwrt", "product": "openwrt", "versions": [{"status": "affected", "version": "< 25.12.5"}]}]}], "published": "2026-07-15T19:18:38.533", "references": [{"url": "https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/openwrt/cgi-io/pull/4", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/openwrt/openwrt/releases/tag/v25.12.5", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq", "tags": ["Vendor Advisory", "Exploit"], "source": "security-advisories@github.com"}, {"url": "https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq", "tags": ["Vendor Advisory", "Exploit"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-07-21T16:06:10.347", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "93C72B3E-525F-44C1-833C-88A85A6BB586", "versionEndExcluding": "25.12.5"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}