CVE-2026-62947 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-62947MEDIUM

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   H   N  U  H  N  N    4.9   .0040   33.5     —

AFFECTED
  Product  Versions     Fixed
  openwrt  < 25.12.5 –  —

TIMELINE
  Jul 14  Reserved by GitHub_M
  Jul 15  EXPLOIT PUBLISHED — CVE-2026-62947 (openwrt). Public exploit reference added.
  Jul 15  Published (CNA: GitHub_M)

CWE-22 · CNA: GitHub_M · CVSS v3.1 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 14, 2026	Reserved	Reserved by GitHub_M
July 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-62947 (openwrt). Public exploit reference added.
July 15, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
openwrt	openwrt	—	< 25.12.5	—

Weaknesses

CWE-22

References (4)

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]

Authoritative record: CVE-2026-62947 at cve.org

Vendors: openwrt

Weaknesses: CWE-22

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-62947 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.