This Week in Threats: Jun 09–Jun 23, 2026

Weekly Threat Summary

9 vulnerabilities were added to the CISA Known Exploited Vulnerabilities (KEV) catalog this period. The highest CVSS score is 9.8.

This week includes 1 critical-severity vulnerabilities (CVSS 9.0+) that require immediate attention.

This Week's Vulnerabilities

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

• CVSS Score: 9.8 (CRITICAL)
• Date Added: 2026-06-18
• Description: Splunk Enterprise contains a missing authentication for critical function vulnerability which could allow an...
• 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.

CVE-2026-11645 — Google Chromium V8 Out-of-Bounds Read and Write Vulnerability

• CVSS Score: 8.8 (HIGH)
• Date Added: 2026-06-09
• Description: Google Chromium V8 out-of-bounds read and write vulnerability that could allow a remote attacker to execute...
• Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CVE-2026-54420 — LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability

• CVSS Score: 8.5 (HIGH)
• Date Added: 2026-06-15
• Description: LiteSpeed cPanel plugin contains a UNIX symbolic link (Symlink) following vulnerability that could allow a user with...
• 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.

CVE-2026-20245 — Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output Vulnerability

• CVSS Score: 7.8 (HIGH)
• Date Added: 2026-06-09
• Description: Cisco Catalyst SD-WAN Manager formerly SD-WAN vManage contains an improper encoding or escaping of output...
• Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CVE-2026-20262 — Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability

• CVSS Score: 6.5 (MEDIUM)
• Date Added: 2026-06-15
• Description: Cisco Catalyst SD-WAN Manager contains a directory or path traversal vulnerability that could allow an...
• 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.

CVE-2026-7473 — Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability

• CVSS Score: 5.8 (MEDIUM)
• Date Added: 2026-06-09
• Description: Arista Extensible Operating System (EOS) contains an incomplete comparison with missing factors vulnerability when...
• Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CVE-2026-48907 — Widget Factory Joomla Content Editor Improper Access Control Vulnerability

• CVSS Score: None (LOW)
• Date Added: 2026-06-16
• Description: Widget Factory Joomla Content Editor contains an improper access control vulnerability which could allow for upload...
• 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.

CVE-2026-10520 — Ivanti Sentry OS Command Injection Vulnerability

• CVSS Score: None (LOW)
• Date Added: 2026-06-11
• Description: Ivanti Sentry (formerly known as MobileIron Sentry) contains an OS command injection vulnerability which could allow...
• 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.

CVE-2026-35273 — Oracle PeopleSoft Enterprise PeopleTools Missing Authentication for Critical Function Vulnerability

• CVSS Score: None (LOW)
• Date Added: 2026-06-12
• Description: Oracle PeopleSoft Enterprise PeopleTools contains a missing authentication for critical function vulnerability which...
• 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.

What This Means for You

If you run any of the affected products, patch immediately. Critical-severity vulnerabilities are actively exploited in the wild — CISA adds them to the KEV catalog specifically because they represent real, current threats.

Use the CVSS Calculator to assess how these scores apply to your specific environment.

Cert Study Angles

These CVEs map directly to certification exam objectives. Use them as real-world case studies:

CompTIA Security+

• CVE-2026-48907 → D1 General Security Concepts
• CVE-2026-10520 → D2 Threats & Vulnerabilities

ISC2 CISSP

• CVE-2026-20253 → D5 IAM, D6 Security Assessment
• CVE-2026-11645 → D6 Security Assessment
• CVE-2026-54420 → D6 Security Assessment
• CVE-2026-20245 → D6 Security Assessment, D8 Software Development
• CVE-2026-20262 → D6 Security Assessment
• CVE-2026-7473 → D6 Security Assessment
• CVE-2026-48907 → D5 IAM, D6 Security Assessment
• CVE-2026-10520 → D6 Security Assessment
• CVE-2026-35273 → D5 IAM, D6 Security Assessment

Cisco CCNA

• CVE-2026-35273 → D5 Security Fundamentals

See all CVEs mapped to your cert: Exploit Tracker

Tools to Help

• CVSS Calculator — Score these vulnerabilities for your specific environment
• Exploit Tracker — Filter KEV vulnerabilities by certification relevance
• Study Tracker — Track your exam objective completion
• Security+ Practice Quiz — Test your knowledge of vulnerability types and mitigations

Stay Updated

This roundup is published every Tuesday. Bookmark the FixTheVuln Blog to stay on top of the latest threats — or subscribe via RSS.