CVE-2021-26988: Clustered Data ONTAP versions prior to 9.3P21, 9.5P16, 9.6P12, 9.7P8 and 9.8 are susceptible to a vulnerabilit

Routine

LOW 3.5MITIGATE

CVE-2021-26988 is a low-severity flaw (CVSS 3.5) affecting data ontap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Clustered Data ONTAP versions prior to 9.3P21, 9.5P16, 9.6P12, 9.7P8 and 9.8 are susceptible to a vulnerability which could allow unauthorized tenant users to discover information related to converting a 7-Mode directory to Cluster-mode such as Storage Virtual Machine (SVM) names, volume names, directory paths and Job IDs.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-862
Published	2021-03-04
Last modified	2026-06-17

Publisher (CNA): NetApp, Inc. · Vendor: netapp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-03-04 21:15 UTCPublished CVE record published
2026-06-17 03:44 UTCUpdated Record last modified

netapp data ontap MITIGATE

Affected: 9.3.0 · 9.3.0 p1 · 9.3.0 p10 · 9.3.0 p11 · 9.3.0 p12 · 9.3.0 p13 · 9.3.0 p14 · 9.3.0 p15

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.3.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-26988?

data ontap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-26988 being exploited?

CVE-2021-26988 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-26988 affect?

CVE-2021-26988 affects data ontap. Severity is low (CVSS 3.5). Clustered Data ONTAP versions prior to 9.3P21, 9.5P16, 9.6P12, 9.7P8 and 9.8 are susceptible to a vulnerability which could allow unauthorized tenant users to discover information related to converting a 7-Mode directory to Cluster-mode suc

How urgent is CVE-2021-26988?

Priority 21/100. No elevated risk signals yet.

Related CVEs

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References

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