CVE-2024-30058 is a vulnerability identified in the Chromium-based Microsoft Edge browser, categorized under CWE-357 (Insufficient UI Warning of Dangerous Operations) and also related to CWE-290 (Authentication Issues). The core issue lies in the browser's failure to provide adequate user interface warnings when users perform potentially dangerous operations, which can lead to spoofing attacks. Spoofing in this context means an attacker could deceive users into believing they are interacting with a legitimate or safe interface element when in fact they are not, potentially leading to unauthorized information disclosure or manipulation. The vulnerability affects version 1.0.0.0 of Microsoft Edge (Chromium-based) and was published on June 13, 2024. The CVSS v3.1 base score is 5.4 (medium severity), with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The impact affects confidentiality and integrity but not availability. No known exploits have been reported in the wild, and no patches have been linked yet, indicating that remediation is pending or in progress. The vulnerability could be exploited through crafted web content or phishing attempts that manipulate the UI to mislead users into performing unsafe actions, such as entering sensitive data or approving malicious operations. The lack of sufficient UI warnings reduces the user's ability to make informed security decisions, increasing the risk of successful social engineering or phishing attacks.

For European organizations, this vulnerability poses a risk primarily to confidentiality and integrity of data accessed or processed via Microsoft Edge. Attackers could exploit the insufficient UI warnings to trick users into divulging sensitive information or executing unauthorized actions, potentially leading to data breaches or account compromise. Sectors such as finance, healthcare, government, and critical infrastructure that rely heavily on secure web browsing and user trust in browser security are particularly vulnerable. The requirement for user interaction means phishing campaigns or social engineering remain the primary exploitation vectors. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after public disclosure. The medium severity rating suggests a moderate but non-trivial risk, warranting prompt attention to prevent escalation. Organizations with large user bases of Microsoft Edge could face widespread exposure if the vulnerability is weaponized.

1. Monitor Microsoft security advisories closely and apply official patches or updates for Microsoft Edge as soon as they become available. 2. Until patches are released, implement browser security policies via Group Policy or endpoint management tools to restrict risky behaviors, such as disabling JavaScript on untrusted sites or limiting pop-ups and redirects. 3. Enhance user awareness training focusing on recognizing phishing attempts and suspicious UI elements, emphasizing caution when prompted for sensitive actions in the browser. 4. Employ multi-factor authentication (MFA) on critical systems to reduce the impact of credential compromise resulting from spoofing attacks. 5. Use endpoint detection and response (EDR) solutions to monitor for unusual browser activity or indicators of compromise. 6. Consider deploying browser isolation or sandboxing technologies to contain potential exploitation. 7. Regularly audit and update browser extensions and plugins to minimize attack surface. 8. Encourage users to verify URLs and security indicators manually, as the vulnerability undermines automated UI warnings.