CVE-2026-25791

HIGH

7.5

Description

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/9/2026

Last Modified2/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

bishopfox:sliver

Weaknesses (CWE)

CWE-306CWE-400

References

https://github.com/BishopFox/sliver/releases/tag/v1.7.0(security-advisories@github.com)

https://github.com/BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjp(security-advisories@github.com)

IOC Correlations

No correlations recorded

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