importantSYS.SOURCE: The Hacker News• 2026-07-28T18:26:14+05:30

Critical OpenWrt DHCPv6 Stack Overflow Vulnerability Allows Root Code Execution

#vulnerability #openwrt #security #network #exploit

A critical stack overflow vulnerability (CVE-2026-53921) in OpenWrt's DHCPv6 implementation allows unauthenticated attackers to execute arbitrary code as root by exploiting crafted DHCPv6 REQUEST messages. The vulnerability was addressed in OpenWrt 24.10.8 and 25.12.5, with additional security issues in LuCI components still under review.

OpenWrt has shipped version 24.10.8 to close a critical DHCPv6 stack overflow and a wider set of remotely triggerable flaws in network services enabled by default.

The critical issue, tracked as CVE-2026-53921 and rated 9.8 on CVSS 3.1 in OpenWrt's GitHub advisory, lets an unauthenticated attacker able to reach the DHCPv6 server overwrite a stack buffer in odhcpd through a crafted DHCPv6

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> ADOBE CAMPAIGN CLASSIC CVSS 10.0 CRITICAL VULNERABILITY ENABLES ARBITRARY CODE EXECUTION WITHOUT USER INTERACTION > HIJACKED HOTEL WI-FI NETWORKS EXPLOIT FAKE UPDATES TO DEPLOY SURVEILLANCE MALWARE > TEN CRITICAL ISSUES IMPACTING NAS SYSTEMS > THE PURPOSE AND VALUE OF LIBERAL ARTS EDUCATION IN MODERN CAREER DEVELOPMENT > DEVELOPMENT PIPELINE AS CRITICAL PRODUCTION SYSTEM IN SOFTWARE ENGINEERING > FLINT: A VISUALIZATION LANGUAGE FOR THE AI ERA > CHALLENGES IN MODERATING A MATRIX COMMUNITY: A WEEK-LONG EXPERIENCE > THE CHALLENGE OF EXISTENCE: A MINDFULNESS PRACTICE FOR PRESENT-MOMENT AWARENESS > OPENAI INVESTIGATES MULTIPLE AI AGENT ESCAPES FROM TEST ENVIRONMENTS > RIVIAN SPINOFF ALSO BEGINS E-BIKE DELIVERIES AMID SUPPLY CHAIN CHALLENGES> ADOBE CAMPAIGN CLASSIC CVSS 10.0 CRITICAL VULNERABILITY ENABLES ARBITRARY CODE EXECUTION WITHOUT USER INTERACTION > HIJACKED HOTEL WI-FI NETWORKS EXPLOIT FAKE UPDATES TO DEPLOY SURVEILLANCE MALWARE > TEN CRITICAL ISSUES IMPACTING NAS SYSTEMS > THE PURPOSE AND VALUE OF LIBERAL ARTS EDUCATION IN MODERN CAREER DEVELOPMENT > DEVELOPMENT PIPELINE AS CRITICAL PRODUCTION SYSTEM IN SOFTWARE ENGINEERING > FLINT: A VISUALIZATION LANGUAGE FOR THE AI ERA > CHALLENGES IN MODERATING A MATRIX COMMUNITY: A WEEK-LONG EXPERIENCE > THE CHALLENGE OF EXISTENCE: A MINDFULNESS PRACTICE FOR PRESENT-MOMENT AWARENESS > OPENAI INVESTIGATES MULTIPLE AI AGENT ESCAPES FROM TEST ENVIRONMENTS > RIVIAN SPINOFF ALSO BEGINS E-BIKE DELIVERIES AMID SUPPLY CHAIN CHALLENGES