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Critical CVEs

CVE-2026-20253 — Splunk Enterprise Missing Authentication for Critical Function Vulnerability

June 18, 2026

Splunk Enterprise Missing Authentication for Critical Function Vulnerability

Affected vendor/product: Splunk Enterprise

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA KEV date added: 2026-06-18

Due date: 2026-06-21

Known ransomware campaign use: Unknown

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