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NTAP-20261016-0005 — CVE-2026-5121 Libarchive Vulnerability in NetApp Products

Published 2026-10-16 · Updated 2026-10-16 · Status: Interim · Exploitation: Public · Severity: HIGH 7.5 · ONTAP affected: Yes

Official advisory: NTAP-20261016-0005 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: ONTAP · NetApp Console / BlueXP | ONTAP-relevant | highest CVSS: 7.5

CVEs in this advisory

CVE-2026-5121 — HIGH · CVSS 7.5 · site index

What the CVE records say

CVE-2026-5121 — A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.

Impact

Successful exploitation of this vulnerability could lead to disclosure of sensitive information.

Affected products

ONTAP tools for VMware vSphere 10
NetApp Console Agent Container (hypervisorcontrol)
NetApp Console Agent Container (mysql)

Official fixes

ONTAP tools for VMware vSphere 10 — vendor fix ↗

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.