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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-20212

Cisco Nexus 3000 and 9000 Series Switches Silicon One Hardware Abstraction Layer Remote Code Execution Vulnerability

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Status
Published
Published
Updated
Assigning organization
cisco

Description

A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with root privileges. This vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 (L3) virtual routing and forwarding (VRF). A successful exploit could allow the attacker to connect to an affected device and send crafted input that could be executed as code with root privileges. The exploitation of this vulnerability could also cause the S1HAL process to crash, which could cause the device to reload.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Cisco Cisco NX-OS Software

Default version status: unknown

  • 10.3(1)affected
  • 10.3(2)affected
  • 10.3(3)affected
  • 10.4(1)affected
  • 10.3(99w)affected
  • 10.3(3w)affected
  • 10.3(99x)affected
  • 10.3(3o)affected
  • 10.3(4)affected
  • 10.3(3p)affected
  • 10.3(4a)affected
  • 10.4(2)affected
  • 10.3(3q)affected
  • 10.3(5)affected
  • 10.4(3)affected
  • 10.3(3x)affected
  • 10.3(4g)affected
  • 10.5(1)affected
  • 10.3(3r)affected
  • 10.3(6)affected
  • 10.4(4)affected
  • 10.3(4h)affected
  • 10.5(2)affected
  • 10.3(7)affected
  • 10.4(5)affected
  • 10.5(3)affected
  • 10.4(4g)affected
  • 10.5(4)affected
  • 10.6(1)affected
  • 10.5(3t)affected
  • 10.3(8)affected
  • 10.4(6)affected
  • 10.5(3s)affected
  • 10.5(3e)affected
  • 10.5(3o)affected
  • 10.6(1s)affected
  • 10.6(2)affected
  • 10.5(3p)affected
  • 10.3(9)affected
  • 10.6(2s)affected
  • 10.6(3)affected
  • 10.4(7)affected
  • 10.5(5)affected
  • 10.6(2n)affected
  • 10.6(3s)affected

References