CVE-2026-39880
MediumCVSS 5.0Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
Remnawave Backend prior to version 2.7.5 contains a glitch in the HWID device registration logic that allows an authenticated user to bypass the configured limit for HWID devices and register more devices than expected, enabling reselling subscriptions and consuming excessive traffic.
Risk Assessment
An attacker can abuse subscription limits, leading to financial losses and network overload.
Recommendation
Update Remnawave Backend to version 2.7.5 or later, which contains the fix.
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Original NVD description (English source)
Remnawave Backend is the backend for the Remnawave proxy and user management solution. Prior to 2.7.5, a glitch in the HWID device registration logic allows an authenticated user to bypass the configured limit for HWID devices and register more devices than expected, allowing them to resell subscriptions and consume excessive traffic. This vulnerability is fixed in 2.7.5.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS