CVE-2026-39908

Medium

Description

OpenBullet2 through version 0.3.2 on Windows contains a credential disclosure vulnerability that allows remote attackers to capture the NTLMv2 hash of the process user by configuring a job proxy source with a UNC path pointing to an attacker-controlled server. When the job starts, the application attempts to load proxies from the UNC path, triggering an SMB authentication attempt that discloses the NTLMv2 hash, which can then be relayed or cracked offline.

SeverityMedium
CVSS6.5
Exploit probability—
ProductOpenbullet2
PublishedJun 8, 2026
First seenJun 8, 2026
Weakness typeCWE-522CWE-522

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
openbullet openbullet2v ≤ 0.3.2—

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