openbullet2 up to 0.3.2 on Windows insufficiently protected credentials

Summaryinfo

A vulnerability marked as problematic has been reported in openbullet2 up to 0.3.2 on Windows. Impacted is an unknown function. The manipulation leads to insufficiently protected credentials. This vulnerability is referenced as CVE-2026-39908. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in openbullet2 up to 0.3.2 on Windows and classified as problematic. This issue affects an unknown code. The manipulation with an unknown input leads to a insufficiently protected credentials vulnerability. Using CWE to declare the problem leads to CWE-522. The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. Impacted is confidentiality. The summary by CVE is:

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.

The weakness was published by Maksim Rogov. It is possible to read the advisory at hackernoon.com. The identification of this vulnerability is CVE-2026-39908 since 04/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-35133). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• openbullet2

Version

• 0.3.0
• 0.3.1
• 0.3.2

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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