Summary
Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
What type of information could be disclosed by this vulnerability?
The type of information that could be disclosed if an attacker successfully exploited this vulnerability is sensitive information.
According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
The user must visit the attacker‑controlled webpage, and perform the two tap gestures that cause autofill to activate.
What is the version information for this release?
151.0.4129.59: 151.0.4129.59, 07/31/2026: 07/31/2026, 151.0.7922.71/.72: 151.0.7922.71/.72
Security updates
151.0.4129.59 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
Vulnerabilities 1
-
Medium 6.5
Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
Time-of-check time-of-use (toctou) race condition in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
Revision history
-
#1
Information published.
References
-
CVE-2026-66314 Microsoft Edge (Chromium-based) Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66314
-
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
-
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
-
Common Vulnerability Scoring System
https://www.first.org/cvss