CVE-2026-53415 in Workplace
Summary
by MITRE • 08/11/2026
Use after Free in the annotator function of Zoom Clients may allow a meeting participant to achieve remote code execution of another participant via network access.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability represents a critical use-after-free condition within the annotator functionality of zoom client applications that could enable remote code execution against other meeting participants. The flaw occurs when the annotator component fails to properly manage memory references after objects have been freed, creating opportunities for malicious actors to manipulate heap memory structures and potentially execute arbitrary code on target systems. This type of vulnerability falls under the common weakness enumeration CWE-416 which specifically addresses use-after-free conditions where program code continues to reference memory after it has been freed by the system. The security implications are particularly severe in collaborative meeting environments where participants may not be fully trusted, as this vulnerability could allow an attacker to gain control over another participant's device without requiring authentication.
The technical exploitation of this vulnerability requires an attacker to have network access to a target participant's system during an active Zoom meeting session. Attackers can manipulate the annotator function through crafted malicious annotations or drawing commands that trigger the use-after-free condition. When legitimate users interact with these manipulated annotations, the freed memory becomes accessible for reuse, potentially allowing attackers to control the execution flow of the application and execute malicious payloads. This vulnerability exists within the client-side processing logic where Zoom handles annotation data from remote participants, creating a vector through which attackers can inject code that executes in the context of the victim's session.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential lateral movement within network environments. An attacker who successfully exploits this use-after-free condition could gain full control over a victim's device, potentially accessing sensitive files, capturing keystrokes, monitoring network traffic, or using the compromised system as a pivot point for attacking other networked devices. The vulnerability affects Zoom client applications across multiple platforms including windows macos and linux operating systems where the annotator functionality is implemented, making it particularly dangerous in enterprise environments where multiple users participate in collaborative meetings.
Mitigation strategies should focus on immediate patching of affected Zoom client versions along with implementing network-level controls to monitor for suspicious annotation patterns that might indicate exploitation attempts. Organizations should also consider implementing application whitelisting policies that restrict the execution of unsigned code and deploy endpoint detection and response solutions that can identify anomalous memory access patterns associated with use-after-free exploits. According to the mitre att&ck framework this vulnerability could map to technique t1059 command and scripting interpreter for initial access and persistence, while the use-after-free condition itself aligns with tactics involving privilege escalation and defense evasion through memory corruption techniques. Regular security updates and user education about suspicious meeting activities remain essential defensive measures against this class of vulnerabilities that exploit client-side memory management flaws in collaborative software environments.