CVE-2026-62947Public exploitNetwork attack vector

Authenticated root file read via pre-canonicalization ACL check

Published Jul 15, 2026 · Updated Jul 15, 2026

Path traversal in OpenWrt before 25.12.5 allows remote authenticated users to read any root-readable file through cgi-download. The main_download function checks the raw path POST field against a wildcard file ACL, then open() resolves embedded .. segments outside the permitted prefix. A valid ubus session with cgi-io download permission and any wildcard file-read grant is required, exposing secrets such as password hashes and private keys.

CVSS severity4.9
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in OpenWrt before 25.12.5 allows remote authenticated users to read any root-readable file through cgi-download. The main_download function checks the raw path POST field against a wildcard file ACL, then open() resolves embedded .. segments outside the permitted prefix. A valid ubus session with cgi-io download permission and any wildcard file-read grant is required, exposing secrets such as password hashes and private keys.

The record

CVE
CVE-2026-62947
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
OpenWrt
Product
OpenWrt
Classifications
CWE-22, T1003.008
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 25.12.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenWrt · OpenWrtversion=< 25.12.5

Published CVSS scores

4.9GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1003.008OS Credential Dumping: /etc/passwd and /etc/shadow

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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