CVE-2021-26994Network attack vector

Authenticated cluster node interruption

Published Jun 4, 2021 · Updated Aug 3, 2024

Denial of service in NetApp ONTAP before 9.7P13 and 9.8P3 allows remote authenticated users to interrupt a cluster node via a single workload. NetApp has not published the affected component or the operation by which the workload disrupts the node. Network access and low-privilege authentication are required, and the documented consequence is limited to availability loss on one node.

CVSS severity6.5
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in NetApp ONTAP before 9.7P13 and 9.8P3 allows remote authenticated users to interrupt a cluster node via a single workload. NetApp has not published the affected component or the operation by which the workload disrupts the node. Network access and low-privilege authentication are required, and the documented consequence is limited to availability loss on one node.

The record

CVE
CVE-2021-26994
Published
Jun 4, 2021
Updated
Aug 3, 2024
Vendor
NetApp
Product
ONTAP
Classifications
T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Versions prior to 9.7P13 and 9.8P3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NetApp · ONTAPversion=Versions prior to 9.7P13 and 9.8P3

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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