CVE•Published 2026-04-30•Modified 2026-05-01•1 article on news•6 live references•NVD data
CVE-2026-42511Freebsd · Freebsd
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
5
Exploit Prediction Scoring System · top 95% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-04-30
Modified 2026-05-01
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag267 hosts
vuln:CVE-2026-42511Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Freebsd"Hosts Shodan identified as running Freebsd.
More intel sources (5)
Shodan report
vuln:CVE-2026-42511Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42511Censys host search filtered to this CVE id.
grep.app
CVE-2026-42511Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42511GitHub code search for direct mentions.
Google dork
"CVE-2026-42511" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-42511 on GitHub.