CVE-2020-14049: Rakuten Viber

High severity, CVSS 7.5. EPSS: 2.2% chance of exploitation in the next 30 days.

Viber for Windows up to 13.2.0.39 does not properly quote its custom URI handler. A malicious website could launch Viber with arbitrary parameters, forcing a victim to send an NTLM authentication request, and either relay the request or capture the hash for offline password cracking. NOTE: this issue exists because of an incomplete fix for CVE-2019-12569.

Affected products

• Rakuten Viber: before 13.2.0.39 (fixed in 13.2.0.39)

Published 2020-06-22. Last modified 2026-06-17.