CVE-2026-25791

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/BishopFox/sliver/releases/tag/v1.7.0	Product Release Notes
https://github.com/BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjp	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:bishopfox:sliver:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-09 21:15

Updated : 2026-02-23 17:42

NVD link : CVE-2026-25791

Mitre link : CVE-2026-25791

CVE.ORG link : CVE-2026-25791

JSON object : View

Products Affected

bishopfox

sliver

CWE

CWE-306

Missing Authentication for Critical Function

CWE-400

Uncontrolled Resource Consumption

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