CVE-2021-21983 (GCVE-0-2021-21983)

Vulnerability from cvelistv5 – Published: 2021-03-31 17:50 – Updated: 2026-08-12 03:55
VLAI KEVIntel
Summary
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.
Severity
No CVSS data available.
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2021-03-31 00:00 UTC
CWE
  • Arbitrary file write vulnerability
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a VMware vRealize Operations Affected: VMware vRealize Operations prior to 8.4
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 223462f4-0bb4-43c9-b84b-86b582fd33b5

Vulnerability ID: CVE-2021-21983

Status: Confirmed

Status Updated: 2026-08-12 04:21 UTC

Exploited: Yes

Timestamps
First Seen: 2026-08-12
Asserted: 2026-08-12
Scope
Notes: Arbitrary file write vulnerability in vRealize Operations Manager API (CVE-2021-21983) prior to 8.4 may allow an authenticated malicious actor with... | Affected: VMware / vRealize Operations Manager | CVSS: 6.5 (MEDIUM) | EPSS: 0.68557 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Arbitrary file write vulnerability in vRealize Operations Manager API (CVE-2021-21983) prior to 8.4 may allow an authenticated malicious actor with...
Vendor VMware
Product vRealize Operations Manager
Added Date 2026-08-12T04:21:08.411Z
Cvss Score 6.5
Epss Score 0.68557
Cvss Severity MEDIUM
Epss Percentile 0.99272
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-08-12 05:00 UTC | Updated: 2026-08-12 05:00 UTC
Show details on NVD website
To clipboard 

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Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://www.vmware.com/security/advisories/VMSA-2021-0004.html\",\"source\":\"security@vmware.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://packetstormsecurity.com/files/162349/VMware-vRealize-Operations-Manager-Server-Side-Request-Forgery-Code-Execution.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://www.vmware.com/security/advisories/VMSA-2021-0004.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:53:56+00:00",
      "cve": "CVE-2021-21983",
      "id": "CVE-2021-21983",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2021-21983",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21983.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.