CVE-2026-20212: Binding to an Unrestricted IP Address in Cisco Cisco NX-OS Software
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.
CVE-2026-20212: Binding to an Unrestricted IP Address in Cisco Cisco NX-OS Software
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.
CVSS v3.1
Score 9.8critical
Affected software
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Nationaal Cyber Security Centrum
- Advisory Id
- NCSC-2026-0338
- Cve Count
- 10
- Additional Cves
- ["CVE-2026-20274","CVE-2026-20275","CVE-2026-20276","CVE-2026-20277","CVE-2026-20278","CVE-2026-20279","CVE-2026-20280","CVE-2026-20354","CVE-2026-20355"]
- Cvss Version
- null
Threat ID: 6a998f56acd9273b491925a3
Added to database: 09/03/2026, 15:16:38 UTC
Last updated: 09/04/2026, 00:51:59 UTC
Views: 6
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