CVE-2025-21267 is a medium-severity spoofing vulnerability affecting Microsoft Edge (Chromium-based). With a CVSS score of 4.4, this vulnerability poses a risk to organizations that utilize this web browser. The vulnerability is classified as a local attack vector, requiring user interaction for exploitation.
This vulnerability allows attackers to manipulate the browser in such a way that could mislead users into thinking they are interacting with a legitimate site, potentially leading to unauthorized access or data exposure.
Organizations should prioritize patching immediately to mitigate risks. As of now, there are no known exploits in the wild, but the potential for misuse remains a concern.
The urgency for defenders is particularly high, given the nature of spoofing attacks and their potential impact on user trust and data integrity.
Vulnerability Details
The official description of CVE-2025-21267 states that it is a Microsoft Edge (Chromium-based) Spoofing Vulnerability. The vulnerability has a CVSS score of 4.4, indicating a medium severity level. Organizations using versions of Microsoft Edge prior to the patch should take immediate action.
The vulnerability is classified under CWE-358, indicating that it involves improper handling of user interface elements that could mislead users.
Technical Analysis
This vulnerability arises from the way Microsoft Edge handles certain user interface elements. The attack vector is local, meaning that an attacker would need to have physical access to the system or require the user to interact with a malicious webpage or application. The attack complexity is low, as it does not require any special privileges, but it does involve user interaction.
There is no requirement for elevated privileges or extensive user interaction, making this vulnerability potentially exploitable in a variety of scenarios. The confidentiality and integrity impacts are both low, but the availability is not affected.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access to sensitive information and the ability to mislead users into believing they are interacting with legitimate services. The blast radius for organizations using Microsoft Edge could be significant, particularly for those in sectors that rely heavily on user trust.
Given the low complexity of exploitation and the requirement for user interaction, organizations must be vigilant in educating users about security practices. The urgency to address this vulnerability is moderate, as it has not yet been actively exploited.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Microsoft Edge (Chromium-based) prior to version 133.0.3065.51 are affected by this vulnerability.
Mitigation & Remediation
Organizations should upgrade to the latest version of Microsoft Edge (Chromium-based) to mitigate this vulnerability. If a patch is not immediately available, consider implementing network controls to restrict access to potentially malicious sites.
Additionally, organizations should conduct regular security assessments and consider engaging in penetration testing to identify similar vulnerabilities across their systems.
Detection Guidance
Organizations should monitor for unusual user behavior that may indicate spoofing attempts. Log indicators from Microsoft Edge sessions may provide insight into potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-21267 highlights the ongoing need for organizations to maintain awareness of vulnerabilities in widely used technologies like Microsoft Edge. Security teams should prioritize user education and ensure that users are aware of the risks associated with spoofing.
This vulnerability represents a pattern of increasing sophistication in user-targeted attacks, emphasizing the importance of robust security measures. Organizations are encouraged to regularly review their security posture against such vulnerabilities.
For further insights, organizations can explore vulnerability management programs and consider engaging in penetration testing to strengthen their defenses.
Finally, organizations should review their incident response plans to ensure they are prepared for the potential exploitation of vulnerabilities like CVE-2025-21267.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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