VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVReported exploited: VulnCheck KEV since Published EPSS 68.8% probability of exploitation in 30 days
VMware

CVE-2021-21983: Arbitrary file write vulnerability in vRealize Operations Manager API (CVE-2021-21983) prior to 8.4 may allow an auth…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .

VulnCheck KEV lists it since . It cites 2 public reports, the first from .

How likely is exploitation in the next 30 days?
68.8%

EPSS score, percentile 99.3 of all scored records. A probability estimated by FIRST, not a report of exploitation.

CISA's SSVC assessment in the CVE record lists exploitation as active.

How severe?
Not scored

The CVE record carries no CVSS score.

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

  • VMware vRealize Operations prior to 8.4

Versions by product

Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

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.

Source: CVE List, as of . About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Versions by product, as listed in the CVE record (1 product)
n/a VMware vRealize Operations
StatusVersions
AffectedVMware vRealize Operations prior to 8.4

Source: CVE List, as of . About the data.

Timeline

DateEvent
CVE record published
CVE record last updated

References

2

Known exploited VMware vulnerabilities

  • CVE-2025-22224: VMware ESXi and Workstation TOCTOU Race Condition Vulnerability (added )
  • CVE-2025-22225: VMware ESXi Arbitrary Write Vulnerability (added )
  • CVE-2025-22226: VMware ESXi, Workstation, and Fusion Information Disclosure Vulnerability (added )
  • CVE-2024-38812: VMware vCenter Server Heap-Based Buffer Overflow Vulnerability (added )
  • CVE-2024-38813: VMware vCenter Server Privilege Escalation Vulnerability (added )