Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to enable Edge Split Screen mode, have a specific configuration, and run multiple pages.

According to the CVSS metrics, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L), and integrity (I:L) but lead to no loss of availability (A:N). What is the impact of this vulnerability?
An attacker who successfully exploited the vulnerability could:
Run scripts intended to get the read token from the parent webpage DOM (Confidentiality), Make changes to the javascript in the parent window (Integrity), But cannot limit access to the resource (Availability)

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
The user would have to open a web page that contained a malicious iframe.

What is the version information for this release?
140.0.3485.54: 140.0.3485.54, 09/05/2025: 09/05/2025, 140.0.7339.80/.81: 140.0.7339.80/.81

According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?
In this case, a successful attack could break the iframe sandbox and allow an iframe to interact with the parent DOM.

Security updates
140.0.3485.54 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security