CVE-2026-55490
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 products
- Openwrt
- Openwrt
- < 25.12.5
- Fix
- Available
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 1.0% (59th percentile)
- Weakness
- CWE-191
- NVD status
- Analyzed
- Published
- 2026-07-07
CVE-2026-55490 at NVD
No indexed exploits for CVE-2026-55490 yet
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No exploit for CVE-2026-55490 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.