{"schemaVersion":3,"id":"CVE-2021-3422","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The lack of validation of a key-value field in the Splunk-to-Splunk protocol results in a denial-of-service in Splunk Enterprise instances configured to index Universal Forwarder traffic. The vulnerability impacts Splunk Enterprise versions before 7.3.9, 8.0 versions before 8.0.9, and 8.1 versions before 8.1.3. It does not impact Universal Forwarders. When Splunk forwarding is secured using TLS or a Token, the attack requires compromising the certificate or token, or both. Implementation of either or both reduces the severity to Medium.","dates":{"published":"2022-03-25T18:02:43.000Z","modified":"2024-08-03T16:53:17.577Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00601,"percentile":0.47742,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00601},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00601,"percentile":0.47742}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00601,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00601,"percentile":null},{"date"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