Command and Control Framework Vulnerability in Sliver by Bishop Fox
CVE-2026-29781
Key Information:
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What is CVE-2026-29781?
A critical flaw in the Sliver command and control framework's Protobuf unmarshalling logic allows authenticated users to trigger an unhandled runtime panic due to insufficient nil-pointer validation. This exploit requires the extraction of valid implant credentials and the omission of nested fields in a signed message. The lack of panic recovery middleware in the mTLS, WireGuard, and DNS transport layers results in a complete termination of the server's process, effectively acting as a kill-switch for all concurrent sessions across the infrastructure. This critical defect necessitates a manual server restart to restore operations and currently has no available patches.
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Affected Version(s)
sliver <= 1.7.3
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.