CVE-2024-38103 is a medium-severity information disclosure vulnerability identified in Microsoft Edge (Chromium-based). The vulnerability is categorized under CWE-359, which involves exposure of private personal information to unauthorized actors. Specifically, this flaw allows an attacker to gain access to sensitive user data that should otherwise remain confidential. The vulnerability has a CVSS v3.1 base score of 5.9, reflecting a network-based attack vector (AV:N) with high attack complexity (AC:H), no privileges required (PR:N), but requiring user interaction (UI:R). The scope is unchanged (S:U), meaning the vulnerability affects the same security scope. The impact on confidentiality is high (C:H), indicating significant data exposure, while integrity impact is low (I:L), and availability impact is none (A:N). The exploitability is limited by the need for user interaction and the high complexity of the attack, which reduces the likelihood of widespread exploitation. No known exploits are currently reported in the wild, but the vulnerability remains a concern due to the sensitive nature of the data exposed. The vulnerability affects Microsoft Edge version 1.0.0, which is the initial Chromium-based release. Given Microsoft Edge's widespread adoption in enterprise and consumer environments, this vulnerability could be leveraged in targeted phishing or social engineering campaigns to trick users into exposing private information. The absence of a patch link suggests that a fix is pending or not yet publicly released, emphasizing the need for vigilance and interim mitigations.

For European organizations, the primary impact of CVE-2024-38103 is the potential unauthorized disclosure of sensitive personal or corporate information through Microsoft Edge. This could lead to privacy violations, regulatory non-compliance (e.g., GDPR), reputational damage, and potential financial loss. Since the vulnerability requires user interaction, phishing or malicious web content could be used to exploit it, increasing the risk in environments with less user awareness or insufficient email/web filtering. The high confidentiality impact means that sensitive data such as credentials, personal identifiers, or confidential business information could be exposed. However, the low integrity and no availability impact limit the threat to data leakage rather than system compromise or denial of service. The medium severity score reflects a moderate risk, but the potential regulatory implications in Europe heighten the importance of addressing this vulnerability promptly. Organizations relying heavily on Microsoft Edge for web access, especially in sectors like finance, healthcare, and government, are at increased risk.

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, restrict or monitor the use of Microsoft Edge in sensitive environments, especially where users may be exposed to untrusted web content. 3. Enhance user awareness training focused on phishing and social engineering to reduce the likelihood of user interaction with malicious content. 4. Implement network-level protections such as web filtering and URL reputation services to block access to known malicious sites. 5. Use endpoint detection and response (EDR) tools to detect anomalous browser behavior that could indicate exploitation attempts. 6. Enforce strict data access controls and minimize the amount of sensitive data accessible via browsers. 7. Consider deploying browser isolation technologies or sandboxing to limit the impact of potential exploits. 8. Review and audit browser extensions and plugins to ensure they do not increase the attack surface. 9. Maintain comprehensive logging and monitoring to detect potential information disclosure incidents promptly.