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NTAP-20261014-0001 — CVE-2026-63374 AnyIO Vulnerability in NetApp Products

Published 2026-10-14 · Updated 2026-10-14 · Status: Interim · Exploitation: Public · Severity: CRITICAL 9.3 · ONTAP affected: Yes

Official advisory: NTAP-20261014-0001 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: ONTAP | ONTAP-relevant | highest CVSS: 9.3

CVEs in this advisory

CVE-2026-63374 — CRITICAL · CVSS 9.3 · site index

What the CVE records say

CVE-2026-63374 — AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.

Impact

Successful exploitation of this vulnerability could lead to disclosure of sensitive information or addition or modification of data.

Affected products

ONTAP Mediator
ONTAP tools for VMware vSphere 10

References

https://nvd.nist.gov/vuln/detail/CVE-2026-63374 ↗

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.