CVE-2026-118176 Bypass of remote UNC path restriction in mailbox: URLs

Thunderbird's check that prevents mailbox: URLs from accessing files on remote Windows network shares could be bypassed using extended-length UNC paths. Displaying a specially crafted email could cause Thunderbird to connect to an SMB server chosen by the attacker, disclosing the user's Windows...

Exploit for Improper Input Validation in Microsoft

Microsoft Outlook Remote Code Execution Vulnerability PoC Th...