CVE-2026-0102 is a vulnerability identified in the Chromium-based Microsoft Edge browser, specifically version 1.0.0.0. The flaw involves the browser's autofill feature, which stores personal information such as addresses, email addresses, and phone numbers to facilitate form completion. Under certain conditions, a malicious webpage can exploit this vulnerability by triggering autofill population after two consecutive taps by the user. This interaction may cause the browser to fill in sensitive autofill data without explicit or clear user consent, thereby exposing private personal information to unauthorized actors. The vulnerability is classified under CWE-359, which concerns the exposure of private information due to insufficient user consent or control mechanisms. The CVSS v3.1 base score is 3.1, reflecting a low severity primarily because exploitation requires user interaction and has a limited impact on confidentiality only, with no impact on integrity or availability. The attack vector is network-based, with high attack complexity, no privileges required, and user interaction necessary. No known exploits have been reported in the wild, and no official patches have been published as of the vulnerability disclosure date. This vulnerability highlights the risks associated with autofill features in browsers, especially when user consent mechanisms are inadequate or can be bypassed through subtle user actions.

The primary impact of CVE-2026-0102 is the potential unauthorized disclosure of users' private personal information stored in the browser's autofill database. This can include sensitive data such as home addresses, email addresses, and phone numbers. For organizations, this could lead to privacy violations, potential social engineering attacks, or targeted phishing campaigns if attackers harvest autofill data from employees or customers. Although the vulnerability does not compromise system integrity or availability, the exposure of personal data can damage organizational reputation and may lead to regulatory compliance issues, especially under data protection laws like GDPR or CCPA. The requirement for user interaction (two taps) and the high complexity of the attack reduce the likelihood of widespread exploitation, but targeted attacks against high-value individuals or organizations remain a concern. Since Microsoft Edge is widely used in enterprise and consumer environments, the scope of affected systems is significant, but the limited severity and lack of known exploits reduce immediate risk.

To mitigate the risk posed by CVE-2026-0102, organizations should: 1) Encourage users to disable autofill features in Microsoft Edge if not essential, especially on devices handling sensitive information. 2) Educate users about the risks of interacting with untrusted or suspicious webpages, emphasizing caution with multiple taps or clicks on unfamiliar sites. 3) Monitor for updates from Microsoft and apply security patches promptly once available to address this vulnerability. 4) Implement browser usage policies that restrict or control autofill usage in sensitive environments. 5) Employ web filtering and endpoint protection solutions to block access to malicious or suspicious webpages that could exploit this vulnerability. 6) Consider using browser extensions or security tools that provide enhanced control over autofill data and user consent mechanisms. 7) Conduct regular security awareness training highlighting social engineering and privacy risks related to browser autofill features. These measures go beyond generic advice by focusing on user behavior, policy enforcement, and proactive patch management tailored to this specific vulnerability.