CVE-2025-13476
Static TLS fingerprint in Rakuten Viber Cloak allows DPI to block proxy traffic.
Is CVE-2025-13476 being exploited?
Not confirmed. CVE-2025-13476 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2025-13476?
CVE-2025-13476 is rated Low with a CVSS score of 3.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-13476?
Not known from our data. No patch reference has been recorded for CVE-2025-13476, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2025-13476 affect?
CVE-2025-13476 affects Rakuten Viber Cloak mode (Android 25.7.2.0g), Rakuten Viber Cloak mode (Windows 25.6.0.0–25.8.1.0). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-13476?
Patch when released; consider disabling Cloak in high-DPI networks.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
DPI can identify Cloak traffic and block it, undermining censorship circumvention.
Patch when possible
- affected>= 25.7.2.0g and < 27.2.0.0g
- affected>= v25.6.0.0 and < v27.3.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.