VDB
CVE-2025-13476
CVE-2025-13476
PUBLISHED
CVSS 9.800000190734863 CRITICAL
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)
EPSS 0.02% · 5.7th percentile
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.02%
5.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rakuten Viber | Rakuten Viber Cloak - Windows | v25.6.0.0, 25.6.0.0, v25.6.0.0 |
| rakuten | viber | 9.3.0.6, 25.6.0, 9.3.0.6 |
| Rakuten Viber | Rakuten Viber Cloak - Android | 25.7.2.0g, 25.7.2.0g, 25.7.2.0g |
Timeline
- Nov 20, 2025 CVE ID Reserved
- Mar 5, 2026 CVE Published
- Mar 6, 2026 EPSS Score
- Mar 6, 2026 CVE Updated
- Mar 7, 2026 EPSS Score
- Mar 8, 2026 EPSS Score
- Mar 10, 2026 EPSS Score
- Mar 11, 2026 EPSS Score
- Mar 12, 2026 EPSS Score
- Mar 13, 2026 EPSS Score
- Mar 14, 2026 EPSS Score
- Mar 16, 2026 EPSS Score