Critical VMware Vulnerabilities: Broadcom Warns of Zero-Day Exploits

In a recent alert, Broadcom issued a warning to customers about the discovery of three zero-day vulnerabilities affecting VMware ESX products. These vulnerabilities, identified as CVE-2025-22224, CVE-2025-22225, and CVE-2025-22226, have already been exploited in active attacks, as reported by the Microsoft Threat Intelligence Center. The flaws pose significant risks, particularly to enterprises that rely on VMware ESXi, vSphere, Workstation, Fusion, Cloud Foundation, and Telco Cloud Platform.

The vulnerabilities allow attackers to bypass the virtual

VMware Zero-Day Vulnerabilities

Broadcom’s warning highlights three distinct vulnerabilities affecting VMware ESX products, which include:

CVE-2025-22224: This critical-severity vulnerability is a heap overflow in the VCMI module, which allows attackers with administrative privileges to execute code within the VMX process running on the host.
CVE-2025-22225: An arbitrary write flaw in ESXi, enabling the VMX process to initiate arbitrary kernel writes, resulting in a dangerous sandbox escape.
CVE-2025-22226: This information-disclosure vulnerability in the HGFS module allows privileged attackers to leak sensitive memory from the VMX process.

These flaws allow attackers to elevate their privileges and potentially move from a compromised virtual machine to the hypervisor itself. VMware products are frequently targeted by ransomware gangs and state-sponsored threat actors because of their use in enterprise environments for handling sensitive data. Broadcom has also pointed out that exploitation of these issues is already occurring in the wild, raising concerns about the ongoing security risks.

What Undercode Says: Analyzing the Implications of VMware Zero-Days

The newly discovered VMware vulnerabilities highlight the ongoing security challenges faced by organizations leveraging virtualization technologies. Given that VMware products are ubiquitous in enterprise settings, the exploitation of these zero-day vulnerabilities poses a major risk to businesses that rely on them for their IT infrastructure.

These vulnerabilities are particularly alarming because they represent an attack vector that can bypass the isolated environment of a virtual machine. In theory, the virtual machine should be contained within a sandbox, ensuring that any malicious activity inside the VM remains isolated from the host system. However, the ability to escape the sandbox and gain access to the hypervisor could allow attackers to control the host machine, potentially compromising not just one VM, but the entire virtualized environment.

The nature of these vulnerabilities makes them particularly dangerous for high-value targets. Enterprises use VMware products to store and transfer sensitive corporate data, and this makes them attractive targets for cybercriminals, including ransomware groups and state-sponsored hackers. The fact that these flaws have been actively exploited “in the wild” suggests that there may be an ongoing, targeted campaign against organizations using VMware solutions.

Another concerning element is that these vulnerabilities are not just theoretical risks; they are already being exploited in real-world attacks. This means that organizations using VMware products must take immediate action to patch these vulnerabilities to prevent further damage. Additionally, the ongoing trend of exploitation of VMware flaws by Chinese state-backed actors, as seen in past zero-day exploits, suggests that these vulnerabilities could be part of a broader geopolitical cybersecurity concern.

The impact of these vulnerabilities could extend far beyond simple data theft or ransomware attacks. Given that VMware ESXi and related products are often used in critical infrastructure environments, an attack that leads to the compromise of a hypervisor could have severe operational consequences, including the disruption of key business processes, loss of access to vital data, and even the potential for broader supply chain attacks.

VMware’s role in enterprise IT systems underscores the importance of addressing security vulnerabilities quickly. While VMware has not yet released patches for these specific zero-days, the urgency of mitigating such risks cannot be overstated. Organizations must stay vigilant, monitor for signs of exploitation, and apply patches as soon as they are made available.

Fact Checker Results

Severity of the vulnerabilities: All three vulnerabilities are critical and have been exploited in real-world attacks.
Target audience: These flaws primarily impact enterprise environments using VMware ESX products, including VMware ESXi and related platforms.
Patch status: VMware has not yet issued patches for the identified vulnerabilities, raising immediate concerns for affected customers.

References:

Reported By: https://www.bleepingcomputer.com/news/security/broadcom-fixes-three-vmware-zero-days-exploited-in-attacks/
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