Unveiling the Latest Zero-Day Vulnerabilities: A Comprehensive List

    skycentral.co.uk | Unveiling the Latest Zero-Day Vulnerabilities: A Comprehensive List

    Unveiling the Latest Zero-Day Vulnerabilities: A Comprehensive List

    The Growing Threat of Zero-Day Vulnerabilities

    Zero-day vulnerabilities pose a significant threat to the security and stability of computer systems and networks. These vulnerabilities refer to the security flaws that cyber attackers discover and exploit before the software developers become aware of them. The term “zero-day” implies that developers have had zero days to fix the vulnerability. This makes zero-day vulnerabilities particularly dangerous as attackers can take advantage of them without fear of detection or patching. In this article, we will discuss the latest zero-day vulnerabilities that have been recently discovered.

    1. CVE-2021-3456: Hypervisor Escape Vulnerability

    One of the most significant zero-day vulnerabilities in recent times is CVE-2021-3456, also known as the Hypervisor Escape Vulnerability. This vulnerability affects the hypervisors used in virtualization technologies, allowing an attacker to escape the virtual machine and gain unauthorized access to the host system. The Hypervisor Escape Vulnerability affects both Windows and Linux systems, making it a widespread concern across various platforms.

    2. CVE-2021-21985: VMware vCenter Server RCE Vulnerability

    Another critical zero-day vulnerability is CVE-2021-21985, which impacts the VMware vCenter Server. This remote code execution (RCE) vulnerability allows attackers to execute arbitrary commands on vulnerable systems. The compromised vCenter Servers can then be used as a launching pad for lateral movement within an organization’s network, potentially resulting in a wide-scale breach affecting multiple systems and services.

    3. CVE-2021-40444: Microsoft Office MSHTML Remote Code Execution Vulnerability

    Microsoft Office users should be particularly cautious due to the CVE-2021-40444 zero-day vulnerability. Exploiting this vulnerability can enable attackers to execute arbitrary code on target systems by tricking users into opening a specially crafted Office document. Since Office documents are commonly used for exchanging information in various organizations, this vulnerability poses a severe risk in terms of potential data breaches and infiltration.

    4. CVE-2021-31166: Remote Code Execution in Windows TCP/IP Stack

    CVE-2021-31166, also known as the “Windows TCP/IP Stack Remote Code Execution Vulnerability,” is another critical zero-day vulnerability that affects numerous Windows versions. By exploiting this vulnerability, attackers can remotely execute arbitrary code on a target system. Given the widespread use of Windows operating systems across personal computers and enterprise networks, this vulnerability demands immediate attention and patching.

    5. CVE-2021-21972: VMware vSphere Client Server-Side Request Forgery

    CVE-2021-21972 is a zero-day vulnerability that impacts VMware vSphere Client. This server-side request forgery (SSRF) vulnerability enables an attacker to make unauthorized requests to internal or external resources by exploiting the vulnerable server. Attackers can use this vulnerability to launch additional attacks, leading to data leakage or system compromise.

    6. CVE-2021-16860: Windows Kernel Local Privilege Escalation Vulnerability

    The CVE-2021-16860 zero-day vulnerability affects the Windows Kernel and can facilitate local privilege escalation. By exploiting this vulnerability, an attacker who has already gained limited access to a system can elevate their privileges, accessing sensitive information and performing unauthorized actions. As local privilege escalation attacks are often the first step towards gaining full control over a compromised system, this vulnerability should not be underestimated.

    Stay Vigilant: The Importance of Zero-Day Vulnerability Management

    In today’s cybersecurity landscape, staying vigilant and proactive in managing zero-day vulnerabilities is crucial. Here are some guidelines to enhance your organization’s defensive measures:

    1. Regular Patching and Updates:

    Promptly apply security patches and updates provided by software vendors. Regularly verifying the latest available patches and ensuring their timely installation can greatly reduce the exposure to zero-day vulnerabilities.

    2. Network Segmentation:

    Implementing network segmentation restricts an attacker’s ability to move laterally across the network. By dividing the network into different segments, you can limit the potential damage caused by an exploit targeting a single system or vulnerability.

    3. Robust Intrusion Detection and Prevention Systems (IDPS):

    Deploying and regularly updating intrusion detection and prevention systems is crucial for identifying and mitigating attempted zero-day attacks. These systems can detect unusual network behavior and block malicious activities before they cause harm.

    4. Security Awareness and Training:

    Educating your employees about the risks associated with zero-day vulnerabilities and providing them with security awareness training can significantly reduce the likelihood of successful attacks. Encourage safe browsing habits, teach them to identify phishing attempts, and emphasize the importance of not opening suspicious email attachments or visiting potentially harmful websites.

    5. Collaborate with Cybersecurity Experts:

    Working with cybersecurity experts who specialize in vulnerability management can provide valuable insights and guidance in dealing with zero-day vulnerabilities. Their expertise can help organizations proactively identify potential vulnerabilities and develop effective strategies to mitigate risks.


    Zero-day vulnerabilities remain a persistent and ever-evolving threat that requires diligent and proactive vulnerability management. By remaining informed about the latest zero-day vulnerabilities and implementing effective defensive measures, organizations can significantly reduce the risk of falling victim to these potentially devastating attacks. Stay updated, stay prepared, and prioritize the security of your systems and networks.