CVE-2026-55490: falha de média gravidade em openwrt
OpenWrt: EAD Integer Underflow → Pre-Auth Denial of Service
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 6.5epss 0.7%
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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Produtos afetados
openwrt · openwrtCVEs relacionadas — openwrt
No mesmo produto, das mais perigosas para as menos.
CVE-2026-30872CRITICALOpenWrt Project has a Stack-based Buffer Overflow vulnerability via IPv6 reverse DNS lookupEPSS 2.4%CVE-2026-30871CRITICALOpenWrt Project has Stack-based Buffer Overflow in DNS PTR QueryEPSS 1.3%CVE-2026-53922MEDIUModhcpd: pre-auth remote DoS via size_t underflow in dhcpv6_ia_handle_IAs (stack BOF, canary-terminated)EPSS 0.6%CVE-2026-62948CRITICALOpenWrt odhcpd/LuCI: unauthenticated DHCPv6 client can inject lease-file lines via FQDN hostname → stored XSS in the LuCI admin UIEPSS 0.6%CVE-2026-62947MEDIUMOpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-downloadEPSS 0.5%CVE-2026-30873LOWOpenWrt Project jsonpath: Memory leak when processing strings, labels, and regexp tokensEPSS 0.5%