CVE-2026-20048 | Nexus 9000 Series Fabric Switches - SNMP Subsystem Operational Intel

Executive Risk Summary

"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper processing when parsing SNMP requests and can be exploited by continuously sending SNMP queries to a specific MIB of an affected device."

Operational Audit Arsenal

Target Type Firmware

Target Asset Cisco Nexus 9000 Series Fabric Switches

Standard Path ACI mode

Manual Verification Required

This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.

Patch Impact Forecast

Reboot Required Likely

High

Internal Work Notes

CVE-2026-20048: Potential DoS condition on Cisco Nexus 9000 Series Fabric Switches due to SNMP vulnerability. Recommend verifying firmware version and applying patch to prevent exploitation.

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Official Advisoryhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-dsnmp-cNN39Uh

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Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.