CVEvulnerability

CVE-2026-55490

6.5 MEDIUM Published 2026-07-07 Modified 2026-07-10 Official page ↗
Status
Analyzed
Published
2026-07-07
Last modified
2026-07-10
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-191

Description

OpenWrt is a Linux operating system targeting embedded devices. Before v25.12.5, an integer underflow in handle_send_a() of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The message length underflows before a bounds check and is then passed to memcpy as a very large size. This issue is fixed v25.12.5.

Affected configurations

• openwrt openwrt (< 25.12.5)

Related

Weakness · CWE (1)

  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References