More information about this CVE will likely be available in a few days

Description


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 account name and NTLM authentication data, which could be used for offline password cracking or relay attacks. This bug only affects Thunderbird on Windows. Other operating systems are unaffected. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.

Related CPE's


Could not find any relations

Weaknesses


Could not find any weaknesses

CVSS impact metrics


Could not find any metrics

Information


Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-27T19:17:29.260Z

21 hours ago

Last modified

2026-10-28T14:42:32.260Z

1 hour ago