8.1

CVE-2026-42511: freebsd

CVSS: 8.1v3.1HighModified
Published 30-04-2026Last modified 01-05-2026
Open JSON

Vulnerability summary

CVE-2026-42511 is a high (CVSS 8.1) vulnerability in freebsd. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.40%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-04-2026
    PublishedVulnerability first disclosed.
  2. 01-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

-0.03 pp

From 0.43% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Freebsd1 product
  • freebsdEOL≥ 15.0-RELEASE, < p7 | ≥ 14.4-RELEASE, < p3 | ≥ 14.3-RELEASE, < p12 | ≥ 13.5-RELEASE, < p13 | 13.5 | 13.5:beta3 | 13.5:p1 | 13.5:p10 | 13.5:p11 | 13.5:p12 | 13.5:p2 | 13.5:p3 | 13.5:p4 | 13.5:p5 | 13.5:p6 | 13.5:p7 | 13.5:p8 | 13.5:p9 | 14.3 | 14.3:p1 | 14.3:p10 | 14.3:p11 | 14.3:p2 | 14.3:p3 | 14.3:p4 | 14.3:p5 | 14.3:p6 | 14.3:p7 | 14.3:p8 | 14.3:p9 | 14.4 | 14.4:p1 | 14.4:p2 | 14.4:rc1 | 15.0 | 15.0:p1 | 15.0:p2 | 15.0:p3 | 15.0:p4 | 15.0:p5 | 15.0:p6

1 vendor · 1 product

References

1 links