Critical 9.8Published Mar 5, 2026

CVE-2025-13476Rakuten Viber uses broken or risky cryptographic Algorithm

Updated under an hour ago (Oct 27, 2026, 9:00 AM ET)

Does this affect you?

It affects Rakuten Viber Cloak - Android and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Rakuten Viber Cloak - Android

Exploited in the last 30 days

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)

CVSS: 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-327, CWE-693
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: certcc
NVD analysis: Analyzed
Record last updated: Mar 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Rakuten Viber Rakuten Viber Cloak - Android rakuten_viber:cloak_android (from the name)	from 25.7.2.0g before 27.2.0.0g	CNA record
Rakuten Viber Rakuten Viber Cloak - Windows rakuten_viber:cloak_windows (from the name)	from v25.6.0.0 before v27.3.0.0	CNA record
rakuten viber rakuten:viber	from 25.6.0 through 25.8.1.0; 9.3.0.6	NVD

References

References

https://www.viber.com/en/download/	product
https://www.kb.cert.org/vuls/id/772695	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.