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NTAP-20260501-0005 — CVE-2026-42511 FreeBSD Vulnerability in NetApp Products

Published 2026-05-01 · Updated 2026-09-03 · Status: Final · Exploitation: Public · Severity: HIGH 8.1 · ONTAP affected: Yes

Official advisory: NTAP-20260501-0005 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: ONTAP | ONTAP-relevant | highest CVSS: 8.1

CVEs in this advisory

CVE-2026-42511 — HIGH · CVSS 8.1 · site index

What the CVE records say

CVE-2026-42511 — 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.

Impact

Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data, Denial of Service (DoS).

Affected products

ONTAP 9

Official fixes

ONTAP 9 — vendor fix ↗
ONTAP 9 — vendor fix ↗
ONTAP 9 — vendor fix ↗
ONTAP 9 — vendor fix ↗
ONTAP 9 — vendor fix ↗

References

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

What to do

Check the affected products listed above against the official advisory's affected-versions table — that is where the exact ONTAP 9 release, ONTAP tool, or management product versions are named.
If affected and a fixed release exists, plan the upgrade — see the ONTAP upgrade runbook.
If exploitation is listed as "active", treat remediation as urgent and review exposure (management LIFs, ONTAP S3, SnapMirror endpoints).
Harden in parallel: security hardening baseline and ransomware protection on ONTAP.