What’s Vulnerable › Vulnerabilities

CVE-2025-4412: TCC Bypass via Dylib Loading in Viscosity.app

• Severity: medium (CVSS 4.8 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-27 · updated 2026-06-17
• Weakness: CWE-276

Description

On macOS systems, by utilizing a Launch Agent and loading the viscosity_openvpn process from the application bundle, it is possible to load a dynamic library with Viscosity's TCC (Transparency, Consent, and Control) identity. The acquired resource access is limited without entitlements such as access to the camera or microphone. Only user-granted permissions for file resources apply. Access to other resources beyond granted-permissions requires user interaction with a system prompt asking for permission. This issue was fixed in version 1.11.5 of Viscosity.

Affected products

• Viscosity: through 1.11.4

References

• https://cert.pl/en/posts/2025/05/tcc-bypass/
• https://www.sparklabs.com/viscosity/

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