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CVE-2025-13476

CRITICAL CVSS: 9.8 Published: 2026-03-05 Modified: 2026-06-17

Description

Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable TLS ClientHello fingerprint lacking extension diversity, allowing Deep Packet Inspection (DPI) systems to trivially identify and block proxy traffic, undermining censorship circumvention. (CWE-327)

Affected Platforms

Rakuten Viber

Weakness Type

CWE-327

References