Home / Security / Advisories / NTAP-20261021-0014

NTAP-20261021-0014 — CVE-2026-18477 GNU Tar Vulnerability in NetApp Products

Published 2026-10-21 · Updated 2026-10-21 · Status: Interim · Exploitation: Public · Severity: MEDIUM 4.4 · ONTAP affected: Yes

Official advisory: NTAP-20261021-0014 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 · NetApp Console / BlueXP · ONTAP · SnapCenter | ONTAP-relevant | highest CVSS: 4.4

CVEs in this advisory

CVE-2026-18477 — MEDIUM · CVSS 4.4 · site index

What the CVE records say

CVE-2026-18477 — A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where the restore is being performed. During restoration, files or directories may be created, renamed or overwritten outside the intended extraction directory. This could lead to unauthorized file modification or, in some cases, privilege escalation. Exploitation does not require the attacker to modify or craft the archive, and standard backup and restore workflows—including extracting into a newly created directory without using the -P option do not mitigate the issue.

Impact

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

Affected products

NetApp HCI Baseboard Management Controller (BMC) - H610S
FAS/AFF Baseboard Management Controller (BMC) - A250/500f/C250
NetApp Console Agent
NetApp Console Agent Container (squid)
NetApp Console Agent OVA
NetApp SolidFire & HCI Management Node
ONTAP tools for VMware vSphere 10
SnapCenter Plug-in for VMware vSphere
iNetApp SolidFire & HCI Storage Node (Element Software)

References

https://bugzilla.redhat.com/show_bug.cgi?id=2509735 ↗

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.