Google has detailed important security updates to fix a recently discovered exploit in its Chrome browser, CVE-2025-6554. On the morning of June 25, 2025, Clément Lecigne from Google’s Threat Analysis Group (TAG) stumbled upon a significant find. He found a type confusion vulnerability in Google’s V8 JavaScript and WebAssembly engine. Nonetheless, the bug has been publicly disclosed, and it represents real-world risk for users. CVE-2025-6554, and an exploit for it is already in the wild.
This CVE-2025-6554 was the fourth zero-day vulnerability that Google patched in Chrome this year alone. The legacy vulnerabilities were CVE-2025-2783, CVE-2025-4664, and CVE-2025-5419. With this announcement, Google really stepped up to the plate. They reduced the immediate risk to all users across every platform in the Stable channel by implementing a configuration change on the day following the vulnerability disclosure.
“An exploit for CVE-2025-6554 exists in the wild,” Google confirmed, underscoring the urgency of the situation. Zero-day vulnerabilities are a huge threat to security. Further, attackers can capitalize on these vulnerabilities before a patch is released at all.
Type confusion vulnerabilities let attackers change the data type of an object in memory via JavaScript, giving them the ability to read and write wherever they want. The NIST’s National Vulnerability Database (NVD) paints a shocking picture. In Google Chrome before 138.0.7204.96, a type confusion issue in V8 enabled remote attackers to perform arbitrary read and write operations via a crafted HTML document. This greatly reduces the effort needed for an attacker to create crafted, proper HTML to use this vulnerability to extract sensitive, private info.
To safeguard users, Google has made security updates for CVE-2025-6554 to prevent future attacks. Keep your browser always updated to the latest version! Simply navigate to Settings, then Help, and click About Google Chrome. That very important update should retroactively trigger the update automatically if someone is using the browser on an outdated version.