Heap-based buffer overflow in OpenWrt - CVE-2025-62526
Published: April 24, 2026
Vulnerability identifier: #VU127514
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-62526
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: openwrt.org
Affected software:
OpenWrt
OpenWrt
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to heap-based buffer overflow in the event registration parsing code when parsing crafted subscription messages. A local user can send a specially crafted message to execute arbitrary code.
The affected code is reached before ACL checks, and the crafted subscription also bypasses the listen ACL.
How to mitigate CVE-2025-62526
Install security update from vendor's website.