CVE-2025-27093: medium-severity vulnerability in BishopFox sliver
Sliver does not restricted traffic between Wireguard clients.
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.3epss 0.3%
Sliver is a command and control framework that uses a custom Wireguard netstack. In versions 1.5.43 and earlier, and in development version 1.6.0-dev, the netstack does not limit traffic between Wireguard clients. This allows clients to communicate with each other unrestrictedly, potentially enabling leaked or recovered keypairs to be used to attack operators or allowing port forwardings to be accessible from other implants.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Affected products
BishopFox · sliverRelated CVEs — BishopFox sliver
In the same product, most dangerous first.
CVE-2024-41111HIGHBishopFox Sliver Authenticated Remote Code ExecutionEPSS 0.7%CVE-2025-27090MEDIUMServer-Side Request Forgery (SSRF) in sliver teamserverEPSS 0.6%CVE-2026-29781LOWSliver: Authenticated Nil-Pointer Dereference in HandlersEPSS 0.6%CVE-2026-25760MEDIUMWebsite Path Traversal / Arbitrary File Read (Authenticated) in SliverEPSS 0.5%CVE-2026-77622HIGHSliver: Unauthenticated Memory Exhaustion Denial of Service in Sliver HTTP(S) Listener PNG DecoderEPSS 0.5%CVE-2026-25791HIGHSliver has a DNS C2 OTP Bypass Allows Unauthenticated Session Flooding and Denial of ServiceEPSS 0.4%