How severe is CVE-2021-27003?

CVE-2021-27003 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-27003 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27003?

CVE-2021-27003 primarily affects Netapp Clustered Data Ontap. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-27003?

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

When was CVE-2021-27003 published?

CVE-2021-27003 was published on 2021-10-12 and last updated on 2026-06-17.

CVE-2021-27003

CVE-2021-27003 is a medium-severity vulnerability in Netapp Clustered Data Ontap with a CVSS 3.x base score of 4.7. 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-1021.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
CVSS v2: 4.3
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1021
Affected product: Netapp Clustered Data Ontap
Published: 2021-10-12
Last modified: 2026-06-17

Description

Clustered Data ONTAP versions prior to 9.5P18, 9.6P15, 9.7P14, 9.8P5 and 9.9.1 are missing an X-Frame-Options header which could allow a clickjacking attack.

Frequently asked questions

What is CVE-2021-27003?: Clustered Data ONTAP versions prior to 9.5P18, 9.6P15, 9.7P14, 9.8P5 and 9.9.1 are missing an X-Frame-Options header which could allow a clickjacking attack.
How severe is CVE-2021-27003?: CVE-2021-27003 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-27003 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27003?: CVE-2021-27003 primarily affects Netapp Clustered Data Ontap. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-27003?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27003 published?: CVE-2021-27003 was published on 2021-10-12 and last updated on 2026-06-17.

References

https://security.netapp.com/advisory/ntap-20211012-0001/

Affected products (16)

cpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.5:-:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.5:p12:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.5:p13:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.5:p6:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.5:p8:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.5:p9:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.6:-:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.6:p1:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.6:p3:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.6:p4:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.6:p7:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.6:p8:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.7:-:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.7:p12:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.8:-:*:*:*:*:*:*

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