CVE-2025-29796 is a vulnerability classified under CWE-451, which pertains to User Interface (UI) misrepresentation of critical information. This specific flaw affects Microsoft Edge for iOS, version 1.0.0.0. The vulnerability allows an unauthorized attacker to perform spoofing attacks over a network by manipulating the UI to misrepresent critical information to the user. Essentially, the attacker can craft deceptive content or alter the browser's displayed information, leading users to believe they are interacting with legitimate sites or data when they are not. This can facilitate phishing, credential theft, or other social engineering attacks. The vulnerability is exploitable remotely (Attack Vector: Network) without requiring privileges or prior authentication, but it does require some user interaction to trigger the spoofing effect. The vulnerability has a CVSS v3.1 base score of 4.7, indicating a medium severity level. The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component, potentially impacting the broader system or user data integrity. The impact is limited to integrity (I:L), with no direct confidentiality or availability impacts. The exploitability is rated as functional (E:P), and the remediation level is official (RL:O) with a confirmed report confidence (RC:C). No known exploits are currently observed in the wild, and no patches have been linked yet. This vulnerability is significant because UI misrepresentation can undermine user trust and enable attackers to bypass security mechanisms that rely on user vigilance, especially on mobile platforms like iOS where screen real estate and UI cues are critical for security decisions.

For European organizations, the impact of this vulnerability lies primarily in the potential for phishing and social engineering attacks targeting employees using Microsoft Edge on iOS devices. Since the flaw allows UI spoofing, attackers could trick users into divulging sensitive corporate credentials or confidential information by presenting fake login pages or misleading security indicators. This could lead to unauthorized access to corporate networks, data breaches, or lateral movement within enterprise environments. The medium severity score reflects that while the vulnerability does not directly compromise confidentiality or availability, the indirect consequences through user deception could be significant. Organizations with mobile-first or bring-your-own-device (BYOD) policies that include iOS devices running Edge are particularly at risk. Additionally, sectors with high regulatory requirements for data protection, such as finance, healthcare, and government agencies in Europe, may face compliance risks if such spoofing leads to data leakage or fraud. The lack of known exploits in the wild currently reduces immediate risk but does not preclude targeted attacks or future exploitation once exploit code becomes available.

1. Immediate mitigation should include educating users about the risks of UI spoofing and encouraging vigilance when interacting with links or entering credentials on mobile browsers. 2. Organizations should enforce multi-factor authentication (MFA) for all critical services to reduce the impact of credential theft resulting from spoofing. 3. Deploy Mobile Device Management (MDM) solutions to monitor and control browser versions on corporate iOS devices, ensuring updates are applied promptly once patches are released. 4. Until an official patch is available, consider restricting or monitoring the use of Microsoft Edge on iOS for sensitive operations, possibly recommending alternative browsers with no known UI spoofing vulnerabilities. 5. Implement network-level protections such as DNS filtering and web proxy solutions that can detect and block known phishing sites or suspicious traffic patterns. 6. Regularly review and update incident response plans to include scenarios involving UI spoofing and social engineering attacks on mobile platforms. 7. Monitor threat intelligence feeds for any emerging exploit code or attack campaigns leveraging this vulnerability to enable rapid response.