Researchers built a Zoom zero-click RCE exploit in under 24 hours using AI, exposing risks to Windows, macOS, iOS, and Android users.
The post Zoom Zero-Click RCE: AI Helped Build an Exploit in Under 24 Hours appeared first on TechRepublic.
Zoom has patched four vulnerabilities, including a critical zero-click flaw, tracked as CVE-2026-53413, in its annotation feature. CVE-2026-53413 is a memory corruption issue found by A Security that could allow a meeting participant to execute code on another participant’s computer.
Due to its impact, the researchers dubbed the flaw “Zoomsday,” it affects Zoom clients on all supported platforms and is linked to the proprietary protocol used by the annotation function. Zoom has now begun rolling out security updates to address the issue.
“Ⓐ Security, the Autonomous Offensive Security and Remediation Platform, discovered a critical flaw in Zoom that let an attacker take complete control of another user’s device during a live call. No click, no download, and nothing required of the victim but being in the meeting.” reads the report published by A Security. “The vulnerability is present in every version of Zoom on every device and operating system: Windows, Mac, iPhone, Android and Linux. The vulnerability exists in all versions up to and including 7.0.5.”
The flaw can corrupt memory through a specially crafted message. Attackers could exploit it to target meeting participants, execute code without user interaction, steal data, activate cameras or microphones, and install malware.
“A Research was able to exploit the fact that every Zoom client automatically parses whatever it receives, sending a specially crafted message to corrupt the receiving client’s memory and run code on it.” continues the advisory. “The protocol opens a direct channel between a viewer and a sharer, letting the attacker target each participant individually.”
Attackers could join or host a Zoom meeting and silently take control of participants’ devices without any user interaction. Once compromised, they could steal data, activate microphones or cameras, or install malware. In large meetings, a single malicious message could expose multiple participants at once.
Zoom’s Android client was chosen as a target because it is closed-source, widely deployed, and exposes a large native-code attack surface. Researchers first ranked 3,762 functions across 70 libraries, but found the JNI-focused approach missed remotely reachable code. Dynamic tracing instead identified libannotate.so and its proprietary annotation protocol.
Reverse engineering showed that annotation objects are serialized and rebuilt from attacker-controlled network data without adequate origin checks. Researchers discovered CVE-2026-53413, a remotely triggerable stack buffer overflow in CAnnoFormatBlock::Deserialize. A wire-controlled count can exceed fixed 128-byte buffers, allowing data to overwrite adjacent memory. The flaw can be reached through Zoom’s normal encrypted transport, requiring no victim interaction or instrumentation.
A Security also found CVE-2026-53414, a missing bounds check in Zoom’s annotator that can cause a buffer overread and crash a meeting participant’s client, enabling DoS attacks. It also identified CVE-2026-53415, a use-after-free flaw, but Zoom had already discovered the issue before A Security reported it.
“Because a zero-click RCE requires no user interaction, we prioritized giving customers time to receive both the client patch and the server-side mitigation before publishing.” concludes the report. “This post follows that coordinated timeline, and we are releasing it alongside CVE assignment,” A Security notes.
This week, Zoom released Workplace versions 7.1.5 and 7.0.6, Rooms version 7.1.5, and Meeting SDK version 7.1.5 for all supported platforms to address the above vulnerabilities.
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Zoom patched a critical Windows flaw that could enable remote account takeover, along with three high-severity privilege-escalation vulnerabilities.
The post Critical Zoom Flaw Could Let Attackers Take Over Windows Accounts appeared first on TechRepublic.
Catch up on the week's biggest tech news, including Google's app store shakeup, Apple's AI expansion, OpenAI's hardware plans, and critical security threats.
The post AI Hardware, App Store Shifts, and Security Scares Define This Week in Tech appeared first on TechRepublic.
Zoom has fixed a critical Windows vulnerability, tracked as CVE-2026-53412 (CVSS score of 9.8) that could allow unauthenticated attackers to hijack user accounts. The flaw affects older versions of Workplace, the Windows VDI Client, and the Meeting SDK for Windows.
“Improper Input Validation in Zoom Desktop Client for Windows, Zoom VDI Client for Windows, and Zoom Meeting SDK for Windows may allow an unauthenticated user to conduct an account takeover via network access.” reads the advisory.
The company Offensive Security team discovered the vulnerability. The company did not provide technical details about the vulnerability.
The company also addressed the following vulnerabilities:
Users should update to the latest versions as soon as possible.
None of the above issues is currently under active exploitation in the wild.
In January, the Cloud-based video conferencing and online collaboration platform released security updates to address multiple vulnerabilities, including command injection, tracked as CVE-2026-22844 (CVSS score of 9.9), in Node Multimedia Routers (MMRs) that could result in remote code execution.
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(SecurityAffairs – hacking, Zoom)
A list of topics we covered in the week of February 23 to March 1 of 2026
The post A week in security (February 23 – March 1) appeared first on Security Boulevard.
Lots of startups use Google’s productivity suite, known as Workspace, to handle email, documents, and other back-office matters. Relatedly, lots of business-minded webapps use Google’s OAuth, i.e. “Sign in with Google.” It’s a low-friction feedback loop—up until the startup fails, the domain goes up for sale, and somebody forgot to close down all the Google stuff.
Dylan Ayrey, of Truffle Security Co., suggests in a report that this problem is more serious than anyone, especially Google, is acknowledging. Many startups make the critical mistake of not properly closing their accounts—on both Google and other web-based apps—before letting their domains expire.
Given the number of people working for tech startups (6 million), the failure rate of said startups (90 percent), their usage of Google Workspaces (50 percent, all by Ayrey’s numbers), and the speed at which startups tend to fall apart, there are a lot of Google-auth-connected domains up for sale at any time. That would not be an inherent problem, except that, as Ayrey shows, buying a domain with a still-active Google account can let you re-activate the Google accounts for former employees.
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