CVE-2025-10585 is the sixth actively exploited Chrome zero-day patched by Google in 2025

CVE-2025-10585 is the sixth actively exploited Chrome zero-day patched by Google in 2025

Pierluigi Paganini
September 18, 2025

Google addressed four vulnerabilities affecting its Chrome web browser, including one that has been exploited in the wild.

Google released security updates to address four vulnerabilities in the Chrome web browser, including CVE-2025-10585, which has reportedly been exploited in the wild.

“Google is aware that an exploit for CVE-2025-10585 exists in the wild.” reads the advisory published by Google.

The zero-day vulnerability CVE-2025-10585 is a type confusion issue in the V8 JavaScript and WebAssembly engine.

A type confusion issue happens when software misinterprets a piece of memory as the wrong type of object. This confusion can let attackers corrupt memory, crash the program, or execute malicious code. It’s common in C/C++ apps like browsers, where weak memory safety makes such exploits possible.

Google’s Threat Analysis Group (TAG) discovered the vulnerability CVE-2025-10585 on September 16, 2025. Google did not share technical details about the attacks exploiting this vulnerability.

Google’s TAG team investigates attacks by nation-state actors and commercial spyware vendors. One of these threat actors likely exploited the issue in the wild.

CVE-2025-10585 is the sixth Chrome zero-day vulnerability that has been actively exploited in the wild in 2025. The other zero-day flaws addressed by Google this year are:

• CVE-2025-5419 – The vulnerability is an out-of-bounds read and write in the V8 JavaScript engine in Google Chrome prior. An attacker can exploit the flaw to trigger a heap corruption via a crafted HTML page. The flaw is actively exploited in the wild.
• CVE-2025-4664 – The vulnerability is a Chrome browser vulnerability that could lead to full account takeover. Google is aware that an exploit for CVE-2025-5419 exists in the wild.
• CVE-2025-2783 – The vulnerability is an incorrect handle provided in unspecified circumstances in Mojo on Windows. Kaspersky researchers Boris Larin (@oct0xor) and Igor Kuznetsov (@2igosha) reported the vulnerability on March 20, 2025. Google released out-of-band fixes to address the high-severity security vulnerability in the Chrome browser for Windows. The flaw was actively exploited in attacks targeting organizations in Russia.
• CVE-2025-6554 – The vulnerability is a type-confusing issue that resides in the V8 JavaScript and WebAssembly engine.
• CVE-2025-6558 – The vulnerability is an insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 that can allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page.

Users should update Chrome to version 140.0.7339.185/.186 on Windows and macOS, and 140.0.7339.185 on Linux to stay protected.

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Pierluigi Paganini

(SecurityAffairs – hacking, Google)