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Critical OpenWrt DHCPv6 Flaw Could Let Unauthenticated Attackers Run Code as Root

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Critical OpenWrt DHCPv6 Flaw Could Let Unauthenticated Attackers Run Code as Root

OpenWrt released version 24.10.8 to address a critical DHCPv6 stack overflow vulnerability (CVE-2026-53921, CVSS 9.8) that allows unauthenticated attackers to overwrite stack buffers in the odhcpd service. The patch also closes additional remotely triggerable flaws in default-enabled network services.

Why it matters: Organizations running OpenWrt devices with DHCPv6 enabled face risk of remote code execution as root from unauthenticated network-adjacent attackers; immediate patching to version 24.10.8 is required.

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vulnerabilities

Critical OpenWrt DHCPv6 Flaw Could Let Unauthenticated Attackers Run Code as Root

OpenWrt released version 24.10.8 to address a critical DHCPv6 stack overflow vulnerability (CVE-2026-53921, CVSS 9.8) that allows unauthenticated attackers to overwrite stack buffers in the odhcpd service. The patch also closes additional remotely triggerable flaws in default-enabled network services.

Why it matters: Organizations running OpenWrt devices with DHCPv6 enabled face risk of remote code execution as root from unauthenticated network-adjacent attackers; immediate patching to version 24.10.8 is required.

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