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NTAP-20261006-0015 — CVE-2026-35191 OpenSSL Vulnerability in NetApp Products

Published 2026-10-06 · Updated 2026-10-06 · Status: Interim · Exploitation: Public · Severity: LOW 3.7 · ONTAP affected: Yes

Official advisory: NTAP-20261006-0015 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: SolidFire / NetApp HCI · Other NetApp products · Baseboard management controllers · Active IQ Unified Manager · Brocade SAN firmware · ONTAP · NetApp Console / BlueXP · SnapCenter | ONTAP-relevant | highest CVSS: 3.7

CVEs in this advisory

CVE-2026-35191 — LOW · CVSS 3.7 · site index

What the CVE records say

CVE-2026-35191 — Issue summary: The OpenSSL QUIC server, when configured to not preform address validation, can be forced to count incoming packets multiple times in its unvalidated credit computation, leading to a violation of the RFC 9000 unvalidated connection amplification limit of 3 times the amount of data received. Impact summary: A remote attacker able to spoof packets to a server using the OpenSSL QUIC implementation might use the server for an amplification of a DDoS attack. CWE: CWE-440: Expected Behavior Violation Description: OpenSSL's QUIC stack, when operating as a server, enforces client address validation (RFC 9000, Section 8), to confirm the peer address is not used for a traffic amplification attack. If this feature is disabled on the server, the QUIC stack limits the amount of server data that can be sent to 3 times the amount of data received from the peer address, until such time as the TLS handshake is completed. The OpenSSL QUIC server, when operating in non-validation mode, adds the length of the whole datagram received to the unvalidated credit limit when processing each QUIC packet in the datagram. A remote peer may, after establishing a connection with an initial client hello frame, send a subsequent datagram containing multiple QUIC packets, leading the server to account the entire datagram length for each packet in the datagram, resulting in the server believing that the peer has sent more data than it actually has, thereby violating the 3x amplification limit mandated by the RFC. FIPS impact: no As the QUIC stack lives outside the FIPS module boundary, no FIPS modules are affected by this CVE.

Impact

Successful exploitation of this vulnerability could lead to Denial of Service (DoS).

Affected products

NetApp HCI Baseboard Management Controller (BMC) - H610S
AFF BIOS - A700s
AFF Baseboard Management Controller (BMC) - A700s
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 Config Advisor
Active IQ OneCollect
Brocade Fabric Operating System Firmware
Brocade SAN Navigator (SANnav)
Cloud Volumes ONTAP Mediator
FAS/AFF BIOS - 8300/8700/A400/C400
FAS/AFF BIOS - A320

References

https://openssl-library.org/news/secadv/20260929.txt ↗

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.