PT-2025-43011 · Openwrt · Openwrt

Published 2025-10-21 · Updated 2026-01-11 · CVE-2025-62526

Positive Technologies (AI Summary)

CVSS v3.1

7.9

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

Name of the Vulnerable Software and Affected Versions OpenWrt versions prior to 24.10.4

Description The ubusd component in the OpenWrt operating system has a heap buffer overflow in the event registration parsing code. Exploitation may allow an attacker to modify data and potentially execute arbitrary code within the context of the ubus daemon. The affected code runs before Access Control List (ACL) checks, meaning all ubus clients can send messages that trigger this issue. Additionally, a crafted subscription can bypass the listen ACL.

Recommendations Versions prior to 24.10.4 should be updated to version 24.10.4 or later.

Exploit

Fix

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

BDU:2025-16397

CVE-2025-62526

GHSA-CP32-65V4-CP73

Affected Products

Openwrt

References · 24

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62526.json · Exploit
• https://github.com/openwrt/openwrt/security/advisories/GHSA-cp32-65v4-cp73 · Vendor Advisory
• https://github.com/openwrt/openwrt/commit/a7901969932a175cded3c93bdeb65f32ed3705e6 · Patch
• https://github.com/openwrt/openwrt/commit/4b907e69ea58fc0ba35fd1755dc4ba22262af3a4 · Patch
• https://github.com/openwrt/ubus/commit/60e04048a0e2f3e33651c19e62861b41be4c290f · Patch
• https://github.com/openwrt/ubus/commit/d31effb4277bd557f5ccf16d909422718c1e49d0 · Patch
• https://github.com/openwrt/ubus/commit/aa4a7ee1d3417bc11207ad0a78d579ece7fe0c13 · Patch
• https://osv.dev/vulnerability/CVE-2025-62526 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-62526 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-62526 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-62526 · Security Note
• https://ubuntu.com/security/CVE-2025-62526 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-16397 · Security Note
• https://twitter.com/YorickReintjens/status/1980709223089729614 · Twitter Post
• https://t.me/securixy_kz/1285 · Telegram Post