CVE-2025-49736 is a vulnerability identified in Microsoft Edge for Android version 1.0.0, categorized under CWE-449, which relates to the user interface performing incorrect actions. This flaw allows an unauthorized attacker to exploit the UI behavior to conduct spoofing attacks over a network. Specifically, the vulnerability causes the browser's UI to perform unintended actions when interacting with certain inputs or network responses, misleading users into believing they are performing legitimate operations when they are not. The attack vector is remote network-based, requiring no privileges or prior authentication, but it does require user interaction, such as clicking a malicious link or visiting a crafted webpage. The CVSS 3.1 base score is 4.3 (medium), reflecting low impact on confidentiality and availability but some impact on integrity due to spoofing potential. The vulnerability does not currently have any known exploits in the wild, and no patches have been released by Microsoft at the time of publication. The issue could be leveraged to deceive users into performing unintended actions, potentially leading to further social engineering or phishing attacks. Given the mobile platform and browser involved, the vulnerability could affect a wide range of users, especially in environments where Edge for Android is used for sensitive browsing or enterprise applications. The lack of patches necessitates proactive mitigation and monitoring by affected organizations.

For European organizations, this vulnerability poses a risk primarily through user deception and spoofing, which can lead to compromised user trust, potential credential theft, or unauthorized transactions if users are tricked into interacting with malicious content. While it does not directly compromise data confidentiality or system availability, the integrity of user interactions is at risk, which can cascade into broader security incidents such as phishing or fraud. Organizations relying on Microsoft Edge for Android for business-critical applications or sensitive communications may face increased risk of targeted social engineering attacks exploiting this flaw. The impact is heightened in sectors like finance, government, and critical infrastructure where mobile device usage is prevalent and trust in browser UI is essential. Additionally, the lack of a patch means organizations must rely on compensating controls until an official fix is released. The medium severity suggests that while the threat is not immediately critical, it should not be ignored, especially given the potential for exploitation in phishing campaigns or network-based attacks.

1. Limit or restrict the use of Microsoft Edge for Android within enterprise environments, especially for sensitive operations, until a patch is available. 2. Educate users about the risk of spoofing and the importance of verifying URLs and actions before interacting with browser prompts or links. 3. Implement network-level protections such as DNS filtering and web proxy solutions to block access to known malicious sites and reduce exposure to crafted network content. 4. Monitor network traffic and endpoint logs for unusual browsing behavior or indicators of spoofing attempts. 5. Encourage users to keep their devices and applications updated and to apply the official patch from Microsoft promptly once released. 6. Consider deploying mobile threat defense (MTD) solutions that can detect and block suspicious activities on Android devices. 7. Use multi-factor authentication (MFA) on critical services to mitigate the impact of potential credential compromise resulting from spoofing. 8. Coordinate with IT and security teams to establish incident response procedures specific to mobile browser spoofing incidents.