CVE-2025-46785: Zoom Meeting SDK DoS Vulnerability

CVE-2025-46785 Overview

Buffer over-read in some Zoom Workplace Apps for Windows may allow an authenticated user to conduct a denial of service via network access.

Critical Impact
This vulnerability can lead to significant disruption in service availability for users who rely on these Zoom applications for essential communication.

Affected Products

Zoom Meeting Software Development Kit
Zoom Rooms
Zoom Rooms Controller

Discovery Timeline

Not Available - Vulnerability discovered by Not Available
Not Available - Responsible disclosure to Zoom
Not Available - CVE CVE-2025-46785 assigned
Not Available - Zoom releases security patch
2025-05-14 - CVE CVE-2025-46785 published to NVD
2025-08-19 - Last updated in NVD database

Technical Details for CVE-2025-46785

Vulnerability Analysis

The buffer over-read occurs due to improper handling of memory in several Zoom Workplace Apps for Windows. This flaw allows an authenticated user to leverage network access to cause a denial of service through crafted data packets that exceed the buffer size.

Root Cause

The root cause of this vulnerability is inadequate boundary checking during data processing, leading to a buffer over-read condition.

Attack Vector

The attack is conducted over the network, exploiting the buffer over-read vulnerability to disrupt service.

#include <string.h>

void vulnerableFunction(char *input) {
    char buffer[10];
    strcpy(buffer, input);
}

// Usage of this function with input > 10 bytes leads to buffer over-read.

Detection Methods for CVE-2025-46785

Indicators of Compromise

Unexpected application crashes
Unresponsive Zoom services
Abnormal network traffic patterns

Detection Strategies

Monitoring for patterns of malformed packets can help detect attempts to exploit this vulnerability. Implement network-based intrusion detection systems (NIDS) to flag any unusual packet sizes or types.

Monitoring Recommendations

Regularly monitor application logs for any signs of abrupt shutdowns or repeated service interruptions. Implement log analysis tools to automate the detection of these indicators.

How to Mitigate CVE-2025-46785

Immediate Actions Required

Disable unnecessary network services to limit exposure
Increase logging verbosity for application activity
Implement additional input validation in network handling components

Patch Information

Check Zoom's security advisory for the latest patch details and apply immediately.

Workarounds

Consider employing application-level firewalls to restrict the types of network packets that can be processed by the application.

bash

# Example IP tables configuration
iptables -A INPUT -p tcp --dport 12345 -j DROP