CVE-2021-42292 is a high-severity vulnerability found in Microsoft Excel. This vulnerability allows attackers to bypass security features, potentially leading to unauthorized access to sensitive data. The CVSS score for this vulnerability is 7.8, indicating a significant risk to organizations using affected versions of Microsoft Office software, particularly Excel. Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability.
The vulnerability was published on November 10, 2021, and impacts multiple Microsoft Office products including 365 Apps, Excel, and Office Long Term Servicing Channel. Given its potential impact, organizations must take proactive steps to address this issue in their environments.
Currently, there are no confirmed public exploits; however, the exploitation status indicates that this vulnerability is actively monitored. Organizations should be aware of the urgency and act promptly to protect their systems.
In light of the current threat landscape, it is crucial for organizations to assess their vulnerability management protocols. Immediate action is warranted to prevent potential exploitation of CVE-2021-42292.
Vulnerability Details
CVE-2021-42292 is classified as a Microsoft Excel Security Feature Bypass Vulnerability. The vulnerability has a CVSS score of 7.8, which falls within the high severity category. The vulnerability allows attackers to bypass security features in Microsoft Excel, leading to high confidentiality, integrity, and availability impacts.
Affected products include Microsoft Excel 2013 SP1, Microsoft Office 2016, Microsoft Office 2019, and Microsoft 365 Apps. Organizations utilizing these products should be particularly vigilant.
The vulnerability was made public on November 10, 2021, and has been analyzed thoroughly. The CWE classification is not specified, but the potential for security feature bypass presents a significant risk.
Technical Analysis
The root cause of CVE-2021-42292 is a flaw in the security features of Microsoft Excel that allows for bypassing established protections. The attack vector is local, meaning that the attacker must have access to the vulnerable system to exploit this vulnerability.
The attack complexity is low, requiring no elevated privileges, but user interaction is necessary for the exploit to be successful. This means that the victim must open a specially crafted file that triggers the vulnerability.
The impact on confidentiality, integrity, and availability is rated as high, indicating that successful exploitation could lead to data breaches or significant disruptions in service.
Risk & Impact Analysis
The deployment of Microsoft Office products in organizational environments poses a substantial risk, especially when considering the potential for data breaches through this vulnerability. The urgency of addressing CVE-2021-42292 is underscored by its high CVSS score of 7.8, which places it in a critical category for immediate remediation.
Organizations must assess their exposure to this vulnerability and prioritize patching in their security patch cycle. The blast radius includes any user with access to Microsoft Excel versions affected by this vulnerability. The risk of exploitation is significant, and organizations should take steps to protect sensitive data.
Given the nature of the vulnerability and the potential consequences, organizations should schedule remediation as soon as possible. Risk to organizations includes unauthorized access to confidential data, leading to potential financial and reputational damage.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects various Microsoft products including 365 Apps, Microsoft Excel 2013 SP1, Microsoft Office 2016, and Microsoft Office 2019. Organizations should consider all versions prior to vendor patch as vulnerable.
Mitigation & Remediation
To mitigate the risks associated with CVE-2021-42292, organizations should apply the latest patches provided by Microsoft. For more information on how to effectively manage vulnerabilities, organizations can refer to best practices in vulnerability management and consider implementing penetration testing to identify and remediate security weaknesses.
Detection Guidance
Organizations should monitor logs for unusual access patterns and behavioral anomalies that may indicate exploitation attempts. Additionally, employing network signatures to detect specific exploit attempts can aid in early detection.
AppSecure Threat Intelligence Insight
CVE-2021-42292 highlights the importance of robust security practices in software development and deployment. The presence of a known vulnerability allows attackers to leverage security feature bypasses, thus underscoring the necessity for continuous security assessments. Security teams should stay informed about emerging vulnerabilities and ensure their remediation processes are agile.
This vulnerability serves as a reminder to prioritize timely patching and to regularly conduct security assessments. For further insights into vulnerability management, refer to our comprehensive vulnerability management program design.
To further enhance security measures, organizations should also consider adopting penetration testing methodologies that are tailored to their specific environments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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