Weekly security intelligence digest covering the most critical vulnerabilities, threats, and breach news from the past week.
🚨 Critical: CISA Known Exploited Vulnerabilities
These vulnerabilities are being actively exploited in the wild. Immediate action required.
CVE-2026-20253: Splunk Enterprise Missing Authentication for Critical Function Vulnerability
Vendor/Product: Splunk Enterprise
Description: Splunk Enterprise contains a missing authentication for critical function vulnerability which could allow an unauthenticated user to create or truncate arbitrary files through a PostgreSQL sidecar service endpoint.
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 Due Date: 2026-06-21
Reference: CVE-2026-20253 - NVD
CVE-2026-48907: Widget Factory Joomla Content Editor Improper Access Control Vulnerability
Vendor/Product: Widget Factory Joomla Content Editor
Description: Widget Factory Joomla Content Editor contains an improper access control vulnerability which could allow for upload and execution of PHP code via the creation of new editor profiles for unauthenticated users.
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 Due Date: 2026-06-19
Reference: CVE-2026-48907 - NVD
📰 This Week’s Security News
New Prinz Eugen ransomware prioritizes recent files for encryption
A new ransomware operation named ‘Prinz Eugen’ prioritizes recently modified files for encryption and leaves no ransom note on the system. […]…
Read more: New Prinz Eugen ransomware prioritizes recent files for encryption
Microsoft links Mastra AI supply chain attack to North Korean hackers
Microsoft has attributed a recent Mastra AI supply chain attack that compromised more than 140 npm packages to the North Korean hacking group Sapphire Sleet, also known as BlueNoroff. […]…
Read more: Microsoft links Mastra AI supply chain attack to North Korean hackers
Klue OAuth breach victim list grows as Icarus hackers claim attack
Market intelligence platform Klue has publicly confirmed a recent security incident that allowed threat actors to steal OAuth tokens used to connect to customers’ Salesforce environments, as the new “…
Read more: Klue OAuth breach victim list grows as Icarus hackers claim attack
✅ What You Should Do This Week
- Immediate: Patch CVE-2026-20253, CVE-2026-48907 (actively exploited)
- Verify: Check your systems against CISA KEV catalog
- Monitor: Review Azure AD sign-in logs for suspicious activity
- Audit: Verify MFA is enforced for all privileged accounts
- Backup: Test your disaster recovery procedures
📬 Stay Updated
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GRC Vitrix provides cloud security and compliance intelligence for financial services professionals. This digest is curated from publicly available sources including CISA, Microsoft MSRC, and industry news.