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NTAP-20251121-0004 — CVE-2023-5981 GnuTLS Vulnerability in NetApp Products

Published 2025-11-21 · Updated 2025-11-21 · Status: Interim · Exploitation: Public · Severity: MEDIUM 5.9 · ONTAP affected: Yes

Official advisory: NTAP-20251121-0004 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 · ONTAP | ONTAP-relevant | highest CVSS: 5.9

CVEs in this advisory

CVE-2023-5981 — MEDIUM · CVSS 5.9 · site index

What the CVE records say

CVE-2023-5981 — A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.

Impact

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

Affected products

Active IQ Unified Manager for VMware vSphere
NetApp HCI Baseboard Management Controller (BMC) - H610S
ONTAP Select Deploy administration utility
NetApp SolidFire & HCI Management Node
NetApp SolidFire & HCI Storage Node (Element Software)
ONTAP tools for VMware vSphere 10

Official fixes

ONTAP Select Deploy administration utility — 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.