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CVE-2026-53920 is a high-severity information disclosure vulnerability in OpenWrt's odhcpd DHCPv6 service. The flaw is triggered when odhcpd processes a truncated DHCPv6 IA_NA or IA_PD option, leading to disclosure of stack memory. The issue affects the DHCPv6 Identity Association handling path in a default-enabled core network service and is reachable by a network-adjacent attacker able to send crafted DHCPv6 traffic to the target device.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity stack memory disclosure vulnerability in OpenWrt odhcpd caused by a truncated DHCPv6 IA_NA/IA_PD option.
A high-severity odhcpd vulnerability allowing stack memory disclosure via a truncated DHCPv6 IA_NA/IA_PD option.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.