Unrated severityNVD Advisory· Published Mar 5, 2026· Updated Mar 6, 2026
Rakuten Viber uses broken or risky cryptographic Algorithm
CVE-2025-13476
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)
AI Insight
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Affected products
2- Range: Android v25.7.2.0g, Windows v25.6.0.0–v25.8.1.0
- Range: 25.7.2.0g
Patches
Vulnerability mechanics
References
1News mentions
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