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    Splunk CVE-2026-20253 RCE - Unexpected Child Process Spawned by splunkd

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    GlassDiceBearhttps://www.dicebear.comhttps://creativecommons.org/publicdomain/zero/1.0/„Glass” (https://www.dicebear.com) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)
    Ethan Andrews@eandrews
    •updated Jun 28, 2026•5•0•14

    Detects remote code execution exploitation targeting CVE-2026-20253 in Splunk. The rule monitors for unauthorized child processes, such as shells or scripting interpreters, being spawned by the Splunk daemon (splunkd). It also flags processes containing exploit-related strings in the command line as a secondary indicator.

    Microsoft Sentinel (KQL)

    Tags

    T1190 - Exploit Public-Facing ApplicationT1059 - Command and Scripting InterpreterTA0001 - Initial AccessTA0002 - ExecutionProcess CreationExploit AttemptWindowsLinuxGeneric Application LogWindows SysmonCVE-2026-20253kql

    Found in

    • Exploitarium: Mass Disclosure of Zero-Day Proof-of-ConceptsLast updated Jul 10, 2026
    • Nightmare Eclipse RoguePlanet Windows Defender Zero-DayLast updated Jun 30, 2026
    • Splunk Enterprise Pre-Authentication Remote Code Execution VulnerabilityLast updated Jun 16, 2026

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