Sigma rule: Exploitation of CVE-2021-26814 in Wazuh

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-0d038d3c53d7, updated 2023-01-02T00:00:00.000Z.

Rule

Title
Exploitation of CVE-2021-26814 in Wazuh
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2021-05-22
Modified
2023-01-02
File
rules-emerging-threats/2021/Exploits/CVE-2021-26814/web_cve_2021_26814_wzuh_rce.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the exploitation of the Wazuh RCE vulnerability described in CVE-2021-26814

Log source

category
webserver

Detection

selection:
    cs-uri-query|contains: '/manager/files?path=etc/lists/../../../../..'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.initial-access
  • attack.t1190
  • cve.2021-21978
  • cve.2021-26814
  • 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-2021-26814/web_cve_2021_26814_wzuh_rce.yml

Sources and licences

  • SigmaHQ

    "Exploitation of CVE-2021-26814 in Wazuh" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-26814/web_cve_2021_26814_wzuh_rce.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: Exploitation of CVE-2021-26814 in Wazuh",
entity page, dataset version ref-0d038d3c53d7, updated 2023-01-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/b9888738-29ed-4c54-96a4-f38c57b84bb3 (accessed 2026-11-03).
Underlying source: SigmaHQ rule b9888738-29ed-4c54-96a4-f38c57b84bb3, 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.