CVE-2025-5066 is a vulnerability identified in the Messages component of Google Chrome on Android devices running versions prior to 137.0.7151.55. The issue stems from an inappropriate implementation that allows a remote attacker to perform UI spoofing attacks. Specifically, if an attacker convinces a user to engage in certain user interface gestures while visiting a crafted HTML page, the attacker can manipulate the UI to display deceptive content. This can mislead users into believing they are interacting with legitimate UI elements when they are not, potentially leading to phishing or other social engineering attacks. The vulnerability is classified under CWE-451, which relates to improper implementation of UI elements that can be exploited for spoofing. The CVSS v3.1 base score is 6.5, indicating a medium severity level. The vector string (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) shows that the attack can be launched remotely over the network without privileges, requires user interaction, affects confidentiality with high impact, but does not affect integrity or availability. No known exploits are currently reported in the wild, and no patches have been linked yet, though the fixed version is 137.0.7151.55 or later. The vulnerability specifically targets Android Chrome users, leveraging UI gesture interactions to trigger the spoofing, which makes it a targeted social engineering risk rather than a fully automated exploit.

For European organizations, this vulnerability poses a significant risk primarily through social engineering attacks that could compromise user trust and confidentiality. Since the attack requires user interaction, the risk is elevated in environments where users frequently access untrusted web content or receive links from external sources. Confidential information could be exposed if users are tricked into entering sensitive data into spoofed UI elements. This can lead to credential theft, unauthorized access to corporate resources, or leakage of personal data, which is particularly critical under the GDPR framework in Europe. The impact is heightened in sectors with high reliance on mobile devices and Chrome browser usage, such as finance, healthcare, and government. Additionally, the medium severity rating suggests that while the vulnerability is not critical, it still demands timely attention to prevent exploitation. The absence of known exploits in the wild provides a window for mitigation before active attacks emerge.

European organizations should prioritize updating Google Chrome on Android devices to version 137.0.7151.55 or later as soon as it becomes available. Until the patch is applied, organizations should implement targeted user awareness training focusing on the risks of interacting with unknown links and performing unsolicited UI gestures on mobile browsers. Deploy mobile device management (MDM) solutions to enforce browser updates and restrict installation of untrusted apps or extensions that could facilitate exploitation. Additionally, consider implementing network-level protections such as web filtering to block access to known malicious or suspicious websites. Security teams should monitor for phishing campaigns that might leverage this vulnerability and prepare incident response plans to address potential UI spoofing attacks. Finally, encourage users to report suspicious UI behavior immediately to IT security teams.