CVE-2025-49458 in Workplace
Summary
by MITRE • 09/10/2025
Buffer overflow in certain Zoom Workplace Clients may allow an authenticated user to conduct a denial of service via network access.
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Analysis
by VulDB Data Team • 09/12/2025
The vulnerability identified as CVE-2025-49458 represents a critical buffer overflow flaw within specific versions of Zoom Workplace client software that enables authenticated users to execute denial of service attacks through network-based exploitation. This issue manifests when the client application fails to properly validate input data during network communication processing, creating a scenario where maliciously crafted network packets can trigger memory corruption. The buffer overflow occurs in the client-side processing logic that handles incoming network data from the Zoom service infrastructure, specifically affecting the memory allocation and data handling mechanisms used for network packet interpretation.
The technical implementation of this vulnerability stems from inadequate bounds checking within the Zoom client's network protocol handler, which operates under the assumption that all incoming data adheres to expected formats and sizes. When an authenticated user sends specially crafted network data that exceeds the allocated buffer space, the application's memory management routines become compromised, leading to unpredictable behavior including application crashes, system instability, and complete service unavailability. This flaw operates at the application layer and requires authentication credentials to exploit, making it particularly concerning for enterprise environments where legitimate users might be compromised or where insider threats exist. The vulnerability directly maps to CWE-121, which describes stack-based buffer overflow conditions, and potentially CWE-122, which covers heap-based buffer overflows, depending on the specific memory corruption pattern observed during exploitation.
The operational impact of this vulnerability extends beyond simple service disruption to encompass broader enterprise security implications, as authenticated access to the Zoom client enables attackers to potentially cause cascading failures across organizational communication systems. Organizations utilizing Zoom Workplace solutions may experience significant downtime during exploitation attempts, with affected systems requiring manual intervention for recovery and potential patch deployment. The vulnerability's network-based nature allows for remote exploitation without requiring physical access to target systems, making it particularly dangerous in environments where network segmentation is insufficient. From an operational security perspective, this vulnerability creates opportunities for attackers to disrupt business continuity, compromise communication channels, and potentially use the denial of service as a precursor to more sophisticated attacks within the enterprise network. The ATT&CK framework categorizes this vulnerability under T1499.004 for Network Denial of Service and T1566.001 for Phishing, as it enables attackers to leverage legitimate authenticated access to cause service disruption.
Mitigation strategies for CVE-2025-49458 should prioritize immediate patch deployment from Zoom's official security advisories, as the vendor has likely released patches addressing the buffer overflow conditions in affected client versions. Network administrators should implement monitoring for unusual network traffic patterns that might indicate exploitation attempts, particularly focusing on malformed packets targeting the Zoom client's network processing components. Organizations should also consider implementing network segmentation to limit the potential impact of successful exploitation attempts and establish incident response procedures specifically addressing client-side denial of service vulnerabilities. Additional defensive measures include disabling unnecessary network services, implementing strict access controls for Zoom client authentication, and conducting regular security assessments of client-side applications to identify similar vulnerabilities. The remediation process should also include comprehensive testing of patched clients in controlled environments before full enterprise deployment to ensure that the patch does not introduce compatibility issues with existing network configurations or business applications that rely on Zoom Workplace functionality.