Is CVE-2026-29004 actively exploited?

No active exploitation of CVE-2026-29004 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-29004 be exploited remotely?

Partially. CVE-2026-29004 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-29004?

CVE-2026-29004 has a CVSS score of 8.1 (HIGH).

HOME VULNERABILITIESCVE-2026-29004

HIGH

CVE-2026-29004

CWE-122Published: May 4, 2026· Updated: May 6, 2026

8.1

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.6th

Official Description

BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the option_to_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening.

NVD Source

Technical Analysis

CVE-2026-29004 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.