CVE-2026-29781
published 2026-03-07CVE-2026-29781: Sliver is a command and control framework that uses a custom Wireguard netstack. In versions from 1.7.3 and prior, a vulnerability exists in the Sliver C2…
PriorityP340medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
0.50%
39.8th percentile
Sliver is a command and control framework that uses a custom Wireguard netstack. In versions from 1.7.3 and prior, a vulnerability exists in the Sliver C2 server's Protobuf unmarshalling logic due to a systemic lack of nil-pointer validation. By extracting valid implant credentials and omitting nested fields in a signed message, an authenticated actor can trigger an unhandled runtime panic. Because the mTLS, WireGuard, and DNS transport layers lack the panic recovery middleware present in the HTTP transport, this results in a global process termination. While requiring post-authentication access (a captured implant), this flaw effectively acts as an infrastructure "kill-switch," instantly severing all active sessions across the entire fleet and requiring a manual server restart to restore operations. At time of publication, there are no publicly available patches.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| bishopfox | sliver | <= 1.7.3 | — |
| github.com | bishopfox_sliver | 0 – 1.7.3 | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv4.02.1LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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OSV
Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers in github.com/bishopfox/sliver
osv·2026-03-10
CVE-2026-29781 Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers in github.com/bishopfox/sliver
Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers in github.com/bishopfox/sliver
Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers in github.com/bishopfox/sliver
OSV
Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers
osv·2026-03-05
CVE-2026-29781 [LOW] Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers
Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers
## 1. Executive Summary
A vulnerability exists in the Sliver C2 server's Protobuf unmarshalling logic due to a systemic lack of nil-pointer validation. By extracting valid implant credentials and omitting nested fields in a signed message, an authenticated actor can trigger an unhandled runtime panic. Because the mTLS, WireGuard, and DNS transport layers lack the panic recovery middleware present in the HTTP transport, this results in a global process termination. While requiring post-authentication access (a captured implant), this flaw effectively acts as an infrastructure "kill-switch," instantly severing all active sessions across the entire fleet and requiring a manual server restart to restore operati
GHSA
Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers
ghsa·2026-03-05
CVE-2026-29781 [LOW] CWE-476 Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers
Sliver is Vulnerable to Authenticated Nil-Pointer Dereference through its Handlers
## 1. Executive Summary
A vulnerability exists in the Sliver C2 server's Protobuf unmarshalling logic due to a systemic lack of nil-pointer validation. By extracting valid implant credentials and omitting nested fields in a signed message, an authenticated actor can trigger an unhandled runtime panic. Because the mTLS, WireGuard, and DNS transport layers lack the panic recovery middleware present in the HTTP transport, this results in a global process termination. While requiring post-authentication access (a captured implant), this flaw effectively acts as an infrastructure "kill-switch," instantly severing all active sessions across the entire fleet and requiring a manual server restart to restore operati
No detection rules found.
No public exploits indexed.
2026-03-07
Published