Sigma rule: CVE-2021-21972 VSphere Exploitation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-87cb747c24cb, updated 2023-01-02T00:00:00.000Z.

Rule

Title
CVE-2021-21972 VSphere Exploitation
Status
test
Level
high
Author
Bhabesh Raj
Date
2021-02-24
Modified
2023-01-02
File
rules-emerging-threats/2021/Exploits/CVE-2021-21972/web_cve_2021_21972_vsphere_unauth_rce_exploit.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the exploitation of VSphere Remote Code Execution vulnerability as described in CVE-2021-21972

Log source

category
webserver

Detection

selection:
    cs-method: 'POST'
    cs-uri-query: '/ui/vropspluginui/rest/services/uploadova'
condition: selection

False positives (as the rule lists them)

  • OVA uploads to your VSphere appliance

Tags

  • attack.initial-access
  • attack.t1190
  • cve.2021-21972
  • detection.emerging-threats

CVEs this rule names

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-21972/web_cve_2021_21972_vsphere_unauth_rce_exploit.yml

Sources and licences

  • SigmaHQ

    "CVE-2021-21972 VSphere Exploitation" by Bhabesh Raj (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-21972/web_cve_2021_21972_vsphere_unauth_rce_exploit.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: CVE-2021-21972 VSphere Exploitation",
entity page, dataset version ref-87cb747c24cb, updated 2023-01-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/179ed852-0f9b-4009-93a7-68475910fd86 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 179ed852-0f9b-4009-93a7-68475910fd86, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.