CVE-2025-47182 is a medium-severity vulnerability identified in the Chromium-based Microsoft Edge browser, specifically affecting version 1.0.0.0. The root cause is improper input validation (CWE-20), which allows an authorized attacker with limited privileges (local access) to bypass a security feature within the browser. The vulnerability does not require user interaction but does require the attacker to have local access with low privileges, and the attack complexity is high, indicating some difficulty in exploitation. The vulnerability impacts the integrity of the system, as it allows an attacker to circumvent security controls, potentially enabling unauthorized actions or privilege escalation within the browser context. Confidentiality and availability are not directly impacted. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component, possibly impacting other processes or security boundaries within the browser. There are no known exploits in the wild at the time of publication, and no patches have been linked yet. The CVSS 3.1 vector (AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C) reflects a local attack vector with high attack complexity, requiring low privileges and no user interaction, with a scope change and impact on integrity only. This vulnerability highlights the importance of robust input validation in browser security features to prevent bypasses that could undermine the browser's security posture.

For European organizations, this vulnerability poses a moderate risk primarily to the integrity of systems using Microsoft Edge (Chromium-based). Since Edge is widely used in corporate environments across Europe, especially in organizations standardized on Microsoft products, an attacker with local access could exploit this flaw to bypass security mechanisms, potentially leading to unauthorized actions such as privilege escalation or execution of malicious code within the browser context. This could facilitate further lateral movement or persistence within enterprise networks. Although the vulnerability requires local access and has high attack complexity, insider threats or attackers who have already compromised a low-privilege account could leverage this vulnerability to escalate privileges or disable security features. This risk is particularly relevant for sectors with high security requirements such as finance, government, and critical infrastructure. The lack of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once patches are released or if the vulnerability is reverse-engineered. The absence of a patch at the time of disclosure means organizations must rely on mitigation strategies until an official fix is available.

1. Restrict local access: Limit the number of users with local access to systems running Microsoft Edge, especially in sensitive environments. 2. Apply the principle of least privilege: Ensure users operate with the minimum privileges necessary to reduce the impact of potential exploitation. 3. Monitor for suspicious local activity: Deploy endpoint detection and response (EDR) tools to detect unusual behavior indicative of privilege escalation or security feature bypass attempts. 4. Use application control policies: Employ Microsoft Defender Application Control or similar tools to restrict execution of unauthorized code or scripts that could leverage this vulnerability. 5. Keep systems updated: Although no patch is currently available, monitor Microsoft security advisories closely and apply updates promptly once released. 6. Employ browser security configurations: Harden Microsoft Edge settings by disabling unnecessary features or extensions that could be leveraged in exploitation. 7. Conduct user awareness training: Educate users about the risks of local attacks and the importance of reporting suspicious activity. 8. Network segmentation: Isolate critical systems to limit the spread of an attacker who gains local access and exploits this vulnerability.