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NTAP-20261021-0009 — CVE-2026-4873 Libcurl Vulnerability in NetApp Products

Published 2026-10-21 · Updated 2026-10-21 · Status: Interim · Exploitation: Public · Severity: MEDIUM 5.9 · ONTAP affected: Yes

Official advisory: NTAP-20261021-0009 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: SolidFire / NetApp HCI · Brocade SAN firmware · Other NetApp products · NetApp Console / BlueXP · ONTAP | ONTAP-relevant | highest CVSS: 5.9

CVEs in this advisory

CVE-2026-4873 — MEDIUM · CVSS 5.9 · site index

What the CVE records say

CVE-2026-4873 — A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.

Impact

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

Affected products

NetApp HCI Baseboard Management Controller (BMC) - H610S
Brocade Fabric Operating System Firmware
FAS/AFF BIOS - A900/9500
NetApp Console Agent Container (docker_occm)
NetApp Console Agent Container (mysql)
NetApp Console Agent OVA
NetApp SolidFire & HCI Management Node
ONTAP tools for VMware vSphere 10
iNetApp SolidFire & HCI Storage Node (Element Software)

References

https://curl.se/docs/CVE-2026-4873.html ↗

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.