CVE-2026-42511HIGH 8.1EPSS p34.3%

CVE-2026-42511CVE-2026-42511

Description

The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it. A rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.43% probability of exploitation · percentile 34.3% · 2026-06-19T12:03:05Z
Published2026-04-30
Last modified2026-05-01

Underlying weaknesses· 1

CWE-149

References

  1. https://security.freebsd.org/advisories/FreeBSD-SA-26:12.dhclient.asc

1

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Quoting Syntaxcwe-1490%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.