CVE-2026-25791

🔴 HIGH

Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessi...

Published
Feb 09, 2026
Last Modified
Feb 09, 2026
Views
113
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Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly create sessions and drive memory exhaustion. This vulnerability is fixed in 1.7.0.

CVSS Scores

CVSS 3.1 7.5
7.5
HIGH
CVSS 2.0 7.5

Additional Information

Source
security-advisories@github.com
State
Undergoing analysis

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