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Rescana Cybersecurity Report: CVE-2025-21298
Date: Jan 2025
Executive Summary
CVE-2025-21298 is a critical vulnerability discovered in the Windows Object Linking and Embedding (OLE) technology, which facilitates remote code execution. This vulnerability has been assigned a CVSS 3.1 score of 9.8, underscoring its high severity. It affects multiple versions of Windows, including Windows 10 and Windows 11. The vulnerability is particularly concerning due to its potential impact on sectors such as finance, healthcare, and government, which are often targeted by Advanced Persistent Threat (APT) groups.
Technical Information
CVE-2025-21298 is classified as a Use After Free vulnerability (CWE-416) within the
An attacker can exploit this vulnerability by sending a specially crafted file or email to the victim. Upon opening the malicious file, the vulnerability is triggered, allowing the attacker to execute arbitrary code on the target system. This can lead to full system compromise, enabling the attacker to install malware, exfiltrate sensitive data, or perform other malicious activities.
The vulnerability affects a wide range of Windows operating systems, including Windows 10, Windows 11, and several versions of Windows Server. The critical nature of this vulnerability necessitates immediate attention and action from organizations and individuals using these systems.
Exploitation in the Wild
As of the latest reports, there are no confirmed instances of CVE-2025-21298 being actively exploited in the wild. However, given the vulnerability's critical nature and the potential for significant damage, it is imperative for organizations to remain vigilant. The exploitation method typically involves phishing emails containing malicious attachments designed to trigger the vulnerability upon opening.
APT Groups using this vulnerability
While specific APT groups exploiting CVE-2025-21298 have not been publicly identified, the tactics, techniques, and procedures (TTPs) associated with this vulnerability align with those used by groups known for targeting Windows systems. These groups often employ phishing campaigns and remote code execution exploits to infiltrate targeted networks, particularly in sectors such as finance, healthcare, and government.
Affected Product Versions
The following Windows versions are affected by CVE-2025-21298: Windows 10, Windows 11, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.
Workaround and Mitigation
Microsoft has released security patches to address CVE-2025-21298. It is crucial for organizations and individuals to apply these updates immediately to mitigate the risk of exploitation. Additionally, users should exercise caution when opening email attachments from unknown sources. Implementing email filtering solutions can help block potentially malicious content. Organizations are also advised to conduct regular security audits and vulnerability assessments to identify and remediate potential security gaps.
References
For more detailed information on CVE-2025-21298, please refer to the following resources: - NVD - CVE-2025-21298: https://nvd.nist.gov/vuln/detail/CVE-2025-21298 - Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21298 - GitHub - Proof of Concept: https://github.com/ynwarcs/CVE-2025-21298
Rescana is here for you
At Rescana, we are committed to helping our customers navigate the complex landscape of cybersecurity threats. Our Continuous Threat and Exposure Management (CTEM) platform provides comprehensive solutions to identify, assess, and mitigate vulnerabilities. For any questions regarding this report or other cybersecurity concerns, please reach out to our team at ops@rescana.com. We are here to support you in safeguarding your digital assets.