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NTAP-20260311-0015 — CVE-2026-27171 Zlib Vulnerability in NetApp Products

Published 2026-03-11 · Updated 2026-08-05 · Status: Interim · Exploitation: Public · Severity: not scored · ONTAP affected: Yes

Official advisory: NTAP-20260311-0015 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: Active IQ Unified Manager · SolidFire / NetApp HCI · Other NetApp products · ONTAP · NetApp Console / BlueXP · SnapCenter | ONTAP-relevant

CVEs in this advisory

CVE-2026-27171 · site index

Impact

Successful exploitation of this vulnerability could lead to Denial of Service (DoS). <br><br> Trident:<br> Affected when NFS is not installed on the Kubernetes node.

Affected products

Active IQ Unified Manager for Linux
Active IQ Unified Manager for Microsoft Windows
Management Services for Element Software and NetApp HCI
NetApp LOADER 8.x
Trident
ATTO FibreBridge - 7600N
Cloud Volumes ONTAP Mediator
NetApp Console Agent OVA
NetApp SolidFire & HCI Management Node
NetApp SolidFire & HCI Storage Node (Element Software)
NetApp XCP NFS
NetApp XCP SMB

Official fixes

Trident — 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.