CVE-2026-20033
published 2026-02-25CVE-2026-20033: 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)…
PriorityP337high7.4CVSS 3.1
AVAACLPRNUINSCCNINAH
EPSS
0.16%
5.4th percentile
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.
Affected
58 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
| cisco | cisco_nx-os_system_software_in_aci_mode | — | — |
CVSS provenance
nvdv3.17.4HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
vendor_cisco7.4HIGH
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Cisco
Cisco Nexus 9000 Series Fabric Switches in ACI Mode Denial of Service Vulnerability
vendor_cisco·2026-02-25·CVSS 7.4
CVE-2026-20033 [HIGH] CWE-805 Cisco Nexus 9000 Series Fabric Switches in ACI Mode Denial of Service Vulnerability
Cisco Nexus 9000 Series Fabric Switches in ACI Mode Denial of Service Vulnerability
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.
Cisco has released software updates that address this vulnerability. There are no workarounds that address thi
Cisco
Cisco Nexus 9000 Series Fabric Switches in ACI Mode Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2026-20033 Cisco Nexus 9000 Series Fabric Switches in ACI Mode Denial of Service Vulnerability
CVE-2026-20033: Cisco Nexus 9000 Series Fabric Switches in ACI Mode Denial of Service Vulnerability
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. Cisco has released software updates that address this vulnerability. There are no
CVSS: 3.1
CWE:
GHSA
GHSA-w865-j4h6-vqm4: A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service
ghsa_unreviewed·2026-02-25
CVE-2026-20033 [HIGH] CWE-805 GHSA-w865-j4h6-vqm4: A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-02-25
Published