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Permalink CVE-2026-20212
9.8 CRITICAL
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): High (H)
created 2 weeks ago Activity log
  • Created & dismissed (no matching packages found) suggestion 2 weeks ago
Cisco Nexus 3000 and 9000 Series Switches Silicon One Hardware Abstraction Layer Remote Code Execution Vulnerability

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

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