CVE-2021-24083 is a high-severity vulnerability affecting Microsoft Windows Address Book, classified as a remote code execution vulnerability. The CVSS score of 7.8 indicates significant risk, especially because it requires user interaction and has a low attack complexity.
Risk to organizations includes unauthorized access and potential system compromise. Attackers may leverage this vulnerability to execute arbitrary code on a vulnerable system, leading to complete control over the affected environment. Organizations should prioritize patching immediately.
This vulnerability has been publicly disclosed, making it critical for organizations to act swiftly. According to Microsoft, the issue affects various Windows versions, including Windows 10, Windows 7, and multiple Windows Server editions.
Given its high severity, organizations are encouraged to assess their exposure and apply the necessary updates or mitigations immediately to prevent exploitation.
Vulnerability Details
The official CVE description states that this vulnerability allows remote code execution on affected installations of Microsoft Windows Address Book. This issue is due to improper handling of objects in memory. An attacker can exploit this vulnerability by convincing a user to open a specially crafted file.
The vulnerability is classified under CWE-787, which relates to improper access control. This vulnerability affects multiple versions of Windows, including Windows 10, Windows 7, and various Windows Server versions. The publication date for this vulnerability was February 25, 2021.
Technical Analysis
The root cause of CVE-2021-24083 lies in the improper handling of objects in memory. Specifically, the attack vector is local, requiring the attacker to interact with the system directly. The attack complexity is low, and no privileges are required for exploitation, although user interaction is necessary.
Exploitation of this vulnerability can lead to high impacts on confidentiality, integrity, and availability, as attackers may gain full control over the affected systems.
Risk & Impact Analysis
Real-world risk includes the potential for attackers to exploit this vulnerability to execute arbitrary code, leading to data breaches or system takeovers. The blast radius for this vulnerability is significant, given the number of affected systems across various Windows versions.
Given its high CVSS score and the potential for active exploitation, organizations should assess their exposure and prioritize remediation efforts. The urgency for addressing this vulnerability is high, especially in environments where legacy systems are still in use.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects the following versions of Microsoft Windows: Windows 10, Windows 7, Windows 8.1, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows Server 2016, and Windows Server 2019. All versions prior to the vendor patch are affected.
Mitigation & Remediation
Organizations are encouraged to apply the necessary patches provided by Microsoft to remediate this vulnerability. The patch information can be found in the Microsoft Security Update Guide. In addition to patching, organizations should consider implementing other security measures such as configuration hardening and monitoring for signs of exploitation.
For a comprehensive overview of penetration testing practices, organizations can refer to the penetration testing service offered by AppSecure.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for indicators of abnormal access patterns or errors related to Windows Address Book. Behavioral anomalies, such as unexpected script execution or unauthorized access attempts, should also be flagged for further investigation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-24083 lies in its demonstration of the ongoing risks associated with local privilege escalation vulnerabilities. Security teams should consider this incident as part of a broader trend in vulnerabilities that exploit user interaction for malicious purposes. Organizations can enhance their defenses by regularly updating their systems and conducting thorough security assessments.
Further insights into vulnerability management can be found in our vulnerability management program design and its importance in mitigating risks.
For organizations utilizing cloud services, understanding the specific challenges they face is crucial. Our cloud penetration testing guide provides a detailed overview of how to secure cloud environments effectively.
Additionally, keeping abreast of trends in the security landscape is vital. The 2025 vulnerability exposure severity trends article offers critical insights that can help organizations adapt their security strategies.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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