CVE-2026-20033
Description
A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation when processing specific Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to the management interface of an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. Note: Only the out-of-band (OOB) management interface is affected.
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Cisco NX-OS System Software in ACI Mode | 15.2(1g), 15.2(2e), 15.2(2f), 15.2(2g), 15.2(2h), 15.2(3f), 15.2(3e), 15.2(3g), 15.2(4d), 15.2(4e), 15.2(5c), 15.2(5d), 16.0(1g), 15.2(5e), 15.2(4f), 15.2(6e), 15.2(6h), 16.0(1j), 15.2(6g), 15.2(7f), 15.2(7g), 16.0(2h), 15.2(8d), 16.0(2j), 15.2(8e), 16.0(3d), 16.0(3e), 15.2(8f), 15.2(8g), 15.3(1d), 15.2(8h), 16.0(4c), 15.3(2a), 15.2(8i), 16.0(5h), 15.3(2b), 16.0(3g), 16.0(5j), 15.3(2c), 16.0(6c), 15.3(2d), 16.1(1f), 16.0(7e), 16.0(8e), 15.3(2e), 16.0(8f), 16.1(2f), 16.1(2g), 15.3(2f), 16.0(9c), 16.1(3f), 16.0(9d), 16.0(6h), 16.0(8h), 16.1(3g), 16.0(9e), 16.1(4h) | — |
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