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    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.

    Published:Feb 9, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 9, 2026
    EPSS Score:0.00027
    CVSS Score:7.5

    Affected Products

    Vendor
    Bishopfox
    Product
    Sliver

    Exploits

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

    Related CVEs

    CVE-2026-34227 (CVSS 5.9) — Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to version 1.7.4, a sin…
    CVE-2026-32941 (CVSS 5.7) — Sliver is a command and control framework that uses a custom Wireguard netstack. Versions 1.7.3 and below cont…
    CVE-2026-29781 (CVSS 2.1) — Sliver is a command and control framework that uses a custom Wireguard netstack. In versions from 1.7.3 and pr…
    CVE-2026-25760 (CVSS 6.5) — Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.6.11, a path trave…
    CVE-2025-27093 (CVSS 6.3) — Sliver is a command and control framework that uses a custom Wireguard netstack. In versions 1.5.43 and earlie…
    CVE-2025-27090 (CVSS 6.9) — Sliver is an open source cross-platform adversary emulation/red team framework, it can be used by organization…
    CVE-2024-41111 (CVSS 7.2) — Sliver is an open source cross-platform adversary emulation/red team framework, it can be used by organization…
    CVE-2023-34758 (CVSS 8.1) — Sliver from v1.5.x to v1.5.39 has an improper cryptographic implementation, which allows attackers to execute …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High