Overview
Microsoft recently disclosed CVE-2025-21298, a vulnerability affecting RTF document processing. Hornetsecurity provides comprehensive protection through multiple security layers and established preventive measures. View Microsoft's advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21298
Long-standing Protection Measures
For over a decade, Hornetsecurity has enforced strict policies against OLE content embedded in RTF files, recognizing office documents as common malware delivery vectors. Our implementation demonstrates effectiveness in testing environments, including detection of the first public CVE-2025-21298 proof-of-concepts.
Protection Mechanisms
- Multi-layered email security beyond signature-based detection
- Advanced content and behavior analysis
- In-depth RTF file structure examination
- Strict OLE content restrictions
- Real-time monitoring and rapid response capabilities
Enhanced Protection with ATP
Customers with Advanced Threat Protection benefit from additional security measures, including sandboxing capabilities for enhanced protection against sophisticated threats.
Current Status
Microsoft released patches for this vulnerability in January 2025 Patch Tuesday updates. Prompt application of these updates is strongly recommended. While technical details about CVE-2025-21298 remain undisclosed publicly, Hornetsecurity's Security Lab actively monitors developments.
Customer Support
As part of our normal security operations, we encourage users to report suspicious emails for further analysis. For guidance on reporting suspicious emails, please visit our support documentation: https://support.hornetsecurity.com/hc/en-us/articles/360012766598-Reporting-False-Positives-and-False-Negatives
Ongoing Protection
Our customers and partners can maintain confidence in their email security through Hornetsecurity's comprehensive protection platform and standard security practices. Our multi-layered approach continues to evolve with the threat landscape.