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CVE-2021-1586 Details

Description

A vulnerability in the Multi-Pod or Multi-Site network configurations for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to unexpectedly restart the device, resulting in a denial of service (DoS) condition. This vulnerability exists because TCP traffic sent to a specific port on an affected device is not properly sanitized. An attacker could exploit this vulnerability by sending crafted TCP data to a specific port that is listening on a public-facing IP address for the Multi-Pod or Multi-Site configuration. A successful exploit could allow the attacker to cause the device to restart unexpectedly, resulting in a DoS condition.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.6 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CNA: [email protected]CVSS-B:8.6 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-tcp-dos-YXukt6gM	CVE	PatchVendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-tcp-dos-YXukt6gM	[email protected]	PatchVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-345	Insufficient Verification of Data Authenticity	[email protected]
CWE-345	Insufficient Verification of Data Authenticity	[email protected]

Affected Products

Product	Versions
cisco nx-os	15.0(2e) 15.1(1h)
CPE cpe:2.3:o:cisco:nx-os:15.0(2e):::::::* cpe:2.3:o:cisco:nx-os:15.1(1h):::::::* Remediation No remediation found in references.
cisco nexus 9000v	All versions
CPE cpe:2.3:h:cisco:nexus_9000v:-:::::::* Remediation No remediation found in references.
cisco nexus 92160yc-x	All versions
CPE cpe:2.3:h:cisco:nexus_92160yc-x:-:::::::* Remediation No remediation found in references.
cisco nexus 92300yc	All versions
CPE cpe:2.3:h:cisco:nexus_92300yc:-:::::::* Remediation No remediation found in references.
cisco nexus 92304qc	All versions
CPE cpe:2.3:h:cisco:nexus_92304qc:-:::::::* Remediation No remediation found in references.
cisco nexus 92348gc-x	All versions
CPE cpe:2.3:h:cisco:nexus_92348gc-x:-:::::::* Remediation No remediation found in references.
cisco nexus 9236c	All versions
CPE cpe:2.3:h:cisco:nexus_9236c:-:::::::* Remediation No remediation found in references.
cisco nexus 9272q	All versions
CPE cpe:2.3:h:cisco:nexus_9272q:-:::::::* Remediation No remediation found in references.
cisco nexus 93108tc-ex	All versions
CPE cpe:2.3:h:cisco:nexus_93108tc-ex:-:::::::* Remediation No remediation found in references.
cisco nexus 93108tc-ex-24	All versions
CPE cpe:2.3:h:cisco:nexus_93108tc-ex-24:-:::::::* Remediation No remediation found in references.
cisco nexus 93108tc-fx	All versions
CPE cpe:2.3:h:cisco:nexus_93108tc-fx:-:::::::* Remediation No remediation found in references.
cisco nexus 93108tc-fx-24	All versions
CPE cpe:2.3:h:cisco:nexus_93108tc-fx-24:-:::::::* Remediation No remediation found in references.
cisco nexus 93108tc-fx3p	All versions
CPE cpe:2.3:h:cisco:nexus_93108tc-fx3p:-:::::::* Remediation No remediation found in references.
cisco nexus 93120tx	All versions
CPE cpe:2.3:h:cisco:nexus_93120tx:-:::::::* Remediation No remediation found in references.
cisco nexus 93128tx	All versions
CPE cpe:2.3:h:cisco:nexus_93128tx:-:::::::* Remediation No remediation found in references.
cisco nexus 9316d-gx	All versions
CPE cpe:2.3:h:cisco:nexus_9316d-gx:-:::::::* Remediation No remediation found in references.
cisco nexus 93180lc-ex	All versions
CPE cpe:2.3:h:cisco:nexus_93180lc-ex:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-ex	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-ex:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-ex-24	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-ex-24:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-fx	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-fx:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-fx-24	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-fx-24:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-fx3	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-fx3:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-fx3s	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-fx3s:-:::::::* Remediation No remediation found in references.
cisco nexus 93216tc-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_93216tc-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 93240yc-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_93240yc-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 9332c	All versions
CPE cpe:2.3:h:cisco:nexus_9332c:-:::::::* Remediation No remediation found in references.
cisco nexus 9332pq	All versions
CPE cpe:2.3:h:cisco:nexus_9332pq:-:::::::* Remediation No remediation found in references.
cisco nexus 93360yc-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_93360yc-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 9336c-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_9336c-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 9336c-fx2-e	All versions
CPE cpe:2.3:h:cisco:nexus_9336c-fx2-e:-:::::::* Remediation No remediation found in references.
cisco nexus 9348gc-fxp	All versions
CPE cpe:2.3:h:cisco:nexus_9348gc-fxp:-:::::::* Remediation No remediation found in references.
cisco nexus 93600cd-gx	All versions
CPE cpe:2.3:h:cisco:nexus_93600cd-gx:-:::::::* Remediation No remediation found in references.
cisco nexus 9364c	All versions
CPE cpe:2.3:h:cisco:nexus_9364c:-:::::::* Remediation No remediation found in references.
cisco nexus 9364c-gx	All versions
CPE cpe:2.3:h:cisco:nexus_9364c-gx:-:::::::* Remediation No remediation found in references.
cisco nexus 9372px	All versions
CPE cpe:2.3:h:cisco:nexus_9372px:-:::::::* Remediation No remediation found in references.
cisco nexus 9372px-e	All versions
CPE cpe:2.3:h:cisco:nexus_9372px-e:-:::::::* Remediation No remediation found in references.
cisco nexus 9372tx	All versions
CPE cpe:2.3:h:cisco:nexus_9372tx:-:::::::* Remediation No remediation found in references.
cisco nexus 9372tx-e	All versions
CPE cpe:2.3:h:cisco:nexus_9372tx-e:-:::::::* Remediation No remediation found in references.
cisco nexus 9396px	All versions
CPE cpe:2.3:h:cisco:nexus_9396px:-:::::::* Remediation No remediation found in references.
cisco nexus 9396tx	All versions
CPE cpe:2.3:h:cisco:nexus_9396tx:-:::::::* Remediation No remediation found in references.
cisco nexus 9508	All versions
CPE cpe:2.3:h:cisco:nexus_9508:-:::::::* Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Sep 2, 2021	Initial Analysis	[email protected]

CVE-2021-1586 Details

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