CVE-2026-39908

MEDIUM

OpenBullet2 0.3.2 NTLMv2 Hash Disclosure via UNC Path Proxy Source

Title source: cna
STIX 2.1

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.

Scores

CVSS v3 6.5
EPSS 0.0054
EPSS Percentile 40.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-522
Status published
Products (1)
openbullet/openbullet2 < 0.3.2
Published Jun 08, 2026
Tracked Since Jun 08, 2026