CVE-2026-75136
Received Received - Intake

Insecure Credential Storage in UpSignOn for Windows

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: VulnCheck

Description
UpSignOn for Windows before 7.19.0 contains an insecure credential storage vulnerability that allows local attackers to retrieve the biometric unlock key stored in the Windows PasswordVault API without triggering any authentication prompt. Attackers can access the stored biometric key from a standard local process within the same Windows session to decrypt the protected vault files and export the entire password manager contents in cleartext.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-03
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-75136
EUVD
EUVD-2026-70261

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
upsignon upsignon to 7.19.0 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-522 The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

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Executive Summary

UpSignOn for Windows before version 7.19.0 stores biometric unlock keys insecurely in the Windows PasswordVault API. Local attackers can access these keys without authentication, decrypt vault files, and extract all password manager contents in plaintext.

Detection Guidance

To detect this vulnerability, check if UpSignOn for Windows versions prior to 7.19.0 are installed. Review running processes for suspicious access to the Windows PasswordVault API. Use PowerShell commands like Get-AppxPackage to list installed applications and Get-Process to monitor for unauthorized access to vault-related processes.

Impact Analysis

If you use UpSignOn for Windows before 7.19.0, a local attacker with access to your session could steal all stored passwords and biometric unlock keys, compromising your accounts and sensitive data.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating GDPR (data protection) and HIPAA (health information privacy) by exposing stored credentials and biometric data.

Mitigation Strategies

Immediately update UpSignOn for Windows to version 7.19.0 or later to patch the insecure credential storage vulnerability. Ensure no unauthorized processes are accessing the Windows PasswordVault API. Review and revoke any suspicious sessions or processes that may have accessed the vault.

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