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CVE-2026-34227

Sliver One-Click Remote Access: Insecure CORS & Unauthenticated MCP Interface

CVSS 5.9 MEDIUMEPSS 0.4%CWE-306CWE-942
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 5.9EPSS 0.4%KEV nãoPoC Nuclei Metasploit Patch
Lifecycle
31 Mar 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to version 1.7.4, a single click on a malicious link gives an unauthenticated attacker immediate, silent control over every active C2 session or beacon, capable of exfiltrating all collected target data (e.g. SSH keys, ntds.dit) or destroying the entire compromised infrastructure, entirely through the operator's own browser. This issue has been patched in version 1.7.4.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Affected products
BishopFox · sliver

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