How severe is CVE-2021-26988?

CVE-2021-26988 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-26988 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26988?

CVE-2021-26988 primarily affects Netapp Data Ontap. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26988?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26988 published?

CVE-2021-26988 was published on 2021-03-04 and last updated on 2026-06-17.

CVE-2021-26988

CVE-2021-26988 is a low-severity vulnerability in Netapp Data Ontap with a CVSS 3.x base score of 3.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 2.7
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Netapp Data Ontap
Published: 2021-03-04
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-26988?: 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.
How severe is CVE-2021-26988?: CVE-2021-26988 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-26988 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26988?: CVE-2021-26988 primarily affects Netapp Data Ontap. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26988?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26988 published?: CVE-2021-26988 was published on 2021-03-04 and last updated on 2026-06-17.

References

https://security.netapp.com/advisory/NTAP-20210303-0001

Affected products (58)

cpe:2.3:o:netapp:data_ontap:9.3.0:-:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p1:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p10:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p11:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p12:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p13:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p14:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p15:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p16:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p17:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p18:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p19:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p2:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p20:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p3:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p4:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p5:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p6:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p7:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p8:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.3.0:p9:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:-:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p1:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p10:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p11:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p12:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p13:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p14:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p15:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p2:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p3:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p4:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p5:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p6:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p7:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p8:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.5.0:p9:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.6.0:-:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.6.0:p1:*:*:*:*:*:*
cpe:2.3:o:netapp:data_ontap:9.6.0:p10:*:*:*:*:*:*

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