Microsoft Edge's Cleartext Password Storage: A Security Wake-Up Call
In May 2026, security researcher Tom Jøran Sønstebyseter Rønning disclosed that Microsoft Edge decrypts and stores all saved user passwords in cleartext within process memory upon browser launch, retaining them throughout the session. This design allows attackers with administrative privileges to access these credentials, posing significant risks in shared and enterprise environments. Microsoft confirmed this behavior is intentional, stating it is 'by design.' This incident underscores the critical need for organizations to reassess their reliance on browser-based password storage solutions. The exposure of credentials in memory highlights vulnerabilities that can be exploited, emphasizing the importance of adopting dedicated password management tools and implementing robust security policies to mitigate such risks.
Kill Chain