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NTAP-20260924-0017 — CVE-2026-56408 Libexpat Vulnerability in NetApp Products
Published 2026-09-24 · Updated 2026-09-25 · Status: Interim · Exploitation: Public · Severity: MEDIUM 6.9 · ONTAP affected: Yes
Official advisory: NTAP-20260924-0017 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.
Product family: SolidFire / NetApp HCI · Baseboard management controllers · Active IQ Unified Manager · ONTAP · Other NetApp products · NetApp Console / BlueXP · SnapCenter | ONTAP-relevant | highest CVSS: 6.9
CVEs in this advisory
- CVE-2026-56408 — MEDIUM · CVSS 6.9 · site index
What the CVE records say
CVE-2026-56408 — libexpat before 2.8.2 has an integer overflow in copyString.
Impact
Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data or Denial of Service (DoS).
Affected products
- NetApp HCI Baseboard Management Controller (BMC) - H610S
- AFF/ASA/FAS Baseboard Management Controller (BMC) - A1K/A90/A70/C80/FAS90/FAS70
- AFF/ASA/FAS Baseboard Management Controller (BMC) - A50/A30/A20/C60/C30/FAS50
- Active IQ Unified Manager for VMware vSphere
- Cloud Volumes ONTAP Mediator
- FAS/AFF BIOS - A900/9500
- FAS/AFF Baseboard Management Controller (BMC) - A320
- FAS/AFF Baseboard Management Controller (BMC) - A800/C800
- FAS/AFF Baseboard Management Controller (BMC) - A900/9500
- FAS/AFF Baseboard Management Controller (BMC) - C190/A150/A220/FAS2720/FAS2750
- FAS/AFF Baseboard Management Controller (BMC) - FAS2820
- FAS/AFF Service Processor - A300/8200
References
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.
Related reading
- Common ONTAP problems (FAQ) — plain-language symptoms and fixes
- ONTAP security hardening — baseline lockdown guidance
- Ransomware protection on ONTAP — SnapLock, SnapMirror vaulting, Anomaly Detection
- ONTAP error messages index — EMS/WAFL/NFS/SnapMirror messages
- Every NetApp advisory published in 2026