May - Top 5 vulnerabilities

1. SQL Injection on Drupal

• Severity: Critical. Unauthenticated access leads to complete database compromise. Actively exploited in the wild immediately after PoC publication.
• Impact: Full data exfiltration (client/internal), administrator account takeover, site defacement, malware distribution, and severe regulatory risks (GDPR).
• Remediation: Apply immediate security patches from Drupal. Validate all input vectors and restrict database user permissions.

2. Remote Code Execution (RCE) on Nginx

• Severity: Critical. Affects public-facing servers and reverse proxies (including F5 BigIP where ASLR is inactive). While some PoCs are limited by memory space randomization on standard distributions, it remains highly dangerous.
• Impact: Full server control, deployment of ransomware/webshells, service interruption, and lateral movement into the internal network.
• Remediation: Patch Nginx immediately. Prioritize updates for load balancers and reverse proxies that do not utilize ASLR protections.

3. "DirtyFrag" Linux Local Privilege Escalation

• Severity: High/Stable. Continuation of the "CopyFail" series. Highly stable and portable across almost all Linux-based systems. Allows local attackers to gain root privileges.
• Impact: Total server compromise once an attacker has initial access, disabling of security tools, and facilitation of lateral movement within the infrastructure.
• Remediation: Apply kernel updates immediately. Ensure strict access controls and monitor for suspicious local execution attempts.

4. Apache HTTP Server RCE

• Severity: Critical. Affects Apache when the mod_http2 module is enabled. While PoCs primarily cause crashes due to ASLR, the potential for RCE remains critical on unprotected or misconfigured environments.
• Impact: Denial of service on web servers, remote code execution, compromise of exposed applications, and disruption of business-critical services.
• Remediation: Disable mod_http2 if not required, or apply vendor patches immediately. Verify server configurations and review Apache error logs for exploitation attempts.

5. Outlook/Word 0-click RCE

• Severity: Critical. Executes code upon document preview in Outlook without any user interaction. The "0-click" nature makes this particularly critical for advanced espionage and phishing campaigns.
• Impact: Silent compromise of user workstations, theft of emails and sensitive data, internal propagation via compromised accounts, and high risk for targeted attacks (APT).
• Remediation: Deploy Microsoft security updates immediately. Disable document preview features in email clients where possible. Implement strict email filtering and sandboxing for attachments.

NVD References