How severe is CVE-2021-21983?

CVE-2021-21983 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-21983 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 69% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21983?

CVE-2021-21983 primarily affects Vmware Cloud Foundation. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21983?

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

When was CVE-2021-21983 published?

CVE-2021-21983 was published on 2021-03-31 and last updated on 2026-06-17.

CVE-2021-21983

CVE-2021-21983 is a medium-severity vulnerability in Vmware Cloud Foundation with a CVSS 3.x base score of 6.5. Its EPSS exploit-prediction score of 69% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 8.5
EPSS exploit prediction: 69% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Vmware Cloud Foundation
Published: 2021-03-31
Last modified: 2026-06-17

Description

Arbitrary file write vulnerability in vRealize Operations Manager API (CVE-2021-21983) prior to 8.4 may allow an authenticated malicious actor with network access to the vRealize Operations Manager API can write files to arbitrary locations on the underlying photon operating system.

Frequently asked questions

What is CVE-2021-21983?: Arbitrary file write vulnerability in vRealize Operations Manager API (CVE-2021-21983) prior to 8.4 may allow an authenticated malicious actor with network access to the vRealize Operations Manager API can write files to arbitrary locations on the underlying photon operating system.
How severe is CVE-2021-21983?: CVE-2021-21983 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-21983 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 69% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21983?: CVE-2021-21983 primarily affects Vmware Cloud Foundation. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21983?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21983 published?: CVE-2021-21983 was published on 2021-03-31 and last updated on 2026-06-17.

References

Affected products (27)

cpe:2.3:a:vmware:cloud_foundation:3.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.5:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.5.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.7:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.7.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.7.2:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.8:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.8.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.9:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.9.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:3.10:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:4.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:cloud_foundation:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:7.5.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:8.0.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:8.1.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:8.1.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:8.2.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_operations_manager:8.3.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_suite_lifecycle_manager:8.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_suite_lifecycle_manager:8.0.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_suite_lifecycle_manager:8.1:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vrealize_suite_lifecycle_manager:8.2:*:*:*:*:*:*:*

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