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Multiple Vulnerabilities Discovered in Zoom, Putting Confidential Data at Risk!

Recent security reports have identified multiple high-risk vulnerabilities in the Zoom application. These vulnerabilities could endanger millions of users, leading to data leaks, privilege escalation attacks, and unauthorized access.

On March 11, 2025, Zoom released a security bulletin detailing vulnerabilities such as CVE-2025-27440 (heap-based buffer overflow), CVE-2025-27439 (buffer underflow), CVE-2025-0151 (use-after-free), and CVE-2025-0150 (incorrect operation sequence in iOS Workplace applications). These vulnerabilities have been rated between 7.1 and 8.5 on the CVSS scale and can affect all versions of Zoom’s desktop, mobile, and Workplace applications.

🔍 Overview of the Identified Vulnerabilities

🔴 Heap-Based Buffer Overflow (CVE-2025-27440)
This vulnerability occurs due to excessive data being written to memory by Zoom Workplace applications, particularly affecting Windows and macOS systems.
📌 Potential Risk: Attackers can send malicious network packets to exploit this flaw, enabling them to escalate privileges from a regular user to an administrator.

🔴 Buffer Underflow (CVE-2025-27439)
This vulnerability arises when Zoom applications read more data than allocated in memory, potentially causing application crashes or exposing confidential data.
📌 Potential Risk: Attackers could use this flaw to execute Denial-of-Service (DoS) attacks or extract sensitive information from Zoom meetings.

🔴 Use-After-Free (CVE-2025-0151)
This issue occurs when Zoom applications access memory that has already been freed, leading to unpredictable behavior.
📌 Potential Risk: Exploiting this vulnerability could allow attackers to execute arbitrary code, steal encryption keys for meetings, or compromise user accounts.

🔴 Incorrect Operation Sequence in iOS Workplace (CVE-2025-0150)
This flaw is caused by an improper sequence of authentication operations in Zoom Workplace for iOS, allowing attackers to obtain unauthorized authentication tokens.
📌 Potential Risk: Cybercriminals could exploit this flaw to access corporate Zoom meetings and authentication tokens, leading to data breaches.

🔴 Insufficient Input Validation (CVE-2025-0149)
This medium-risk vulnerability occurs when Zoom applications accept improperly formatted network packets without adequate verification.
📌 Potential Risk: Attackers could send malicious requests to disrupt services (DoS attacks) or manipulate application behavior.

🛑 Affected Devices and Software

✅ Vulnerable Versions:

  • Zoom Desktop Clients (Windows, macOS, Linux) – versions before 5.15.5 and 6.2.0
  • Zoom Mobile Apps (Android, iOS) – versions before 5.15.5
  • Zoom Meeting SDK and VDI Clients – versions before 5.14.12

❗ All vulnerabilities have been patched in Zoom version 6.2.0 and later.

📢 Zoom urges all users to update their applications immediately!

🔐 How to Protect Yourself from Zoom Attacks

📌 1. Update Zoom Workplace, Meeting SDK, and VDI Clients Immediately!
Older versions remain vulnerable, so upgrade to 6.2.0 or later as soon as possible.

📌 2. Strengthen Network Security!
Ensure that only authenticated users can access devices running Zoom.

📌 3. Monitor Log Files for Suspicious Activity!
Regularly check for anomalies, such as:
✅ Unexpected privilege escalations
✅ Frequent crashes in Zoom meetings
✅ Unusual network requests originating from Zoom

📌 4. Additional Security Measures for Enterprises:
For companies handling sensitive information:
✅ Consider alternatives with end-to-end encryption (E2EE)
✅ Use VPNs and network segmentation to secure Zoom traffic

⚠ Zoom: A Convenient Tool or a Security Risk?

Despite regular updates, vulnerabilities related to buffer overflow and insufficient input validation continue to emerge. The history of Zoom security issues, including the “Zoom-bombing” incidents in 2020, shows that its security architecture still has weaknesses.

📌 Key Takeaways:
🔴 Zoom is not inherently secure – organizations and users should implement additional security measures.
🔴 For handling confidential data, Zoom is not recommended unless strict security protocols are in place.

🚨 Update Zoom immediately and take necessary precautions to secure your data! 🚨