NVD

CVE-2024-20321 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

A vulnerability in the External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue. An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device. A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

CNA: Cisco Systems, Inc.

Base Score: 8.6 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ	CVE, Cisco Systems, Inc.	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	NIST
CWE-400	Uncontrolled Resource Consumption	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 3:06:25 AM

Action

Type

Old Value

New Value

Added

Affected

Record truncated, showing 2048 of 4850 characters.
View Entire Change Record

[{"vendor":"cisco","product":"nx-os","defaultStatus":"unknown","cpes":["cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f1\\(1\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f2\\(1\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f2\\(2\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f3\\(1\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f3\\(2\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f3\\(3\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f3\\(3a\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f3\\(4\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f3\\(3c\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:7.0\\(3\\)f3\\(5\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.2\\(1\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.2\\(2\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.2\\(2t\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.2\\(3\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.2\\(4\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.2\\(2v\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(1\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(2\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(3\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(4\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(5\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(6\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(7\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(7a\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(8\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(9\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(10\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(11\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:9.3\\(12\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.1\\(1\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.1\\(2\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.1\\(2t\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.2\\(1\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.2\\(1q\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.2\\(2\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.2\\(3\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.2\\(3t\\):*:*:*:*:*:*:*","cpe:2.3:o:cisco:nx-os:10.2\\(4\\):*:*:*:*:*:*:*","cpe:

Added

SSVC

{"timestamp":"2024-03-01T16:27:01.615257Z","id":"CVE-2024-20321","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by Cisco Systems, Inc. 6/17/2026 3:06:25 AM

Action

Type

Old Value

New Value

Added

Affected

Record truncated, showing 2048 of 2120 characters.
View Entire Change Record

[{"vendor":"Cisco","product":"Cisco NX-OS Software","versions":[{"version":"7.0(3)F1(1)","status":"affected"},{"version":"7.0(3)F2(1)","status":"affected"},{"version":"7.0(3)F2(2)","status":"affected"},{"version":"7.0(3)F3(1)","status":"affected"},{"version":"7.0(3)F3(2)","status":"affected"},{"version":"7.0(3)F3(3)","status":"affected"},{"version":"7.0(3)F3(3a)","status":"affected"},{"version":"7.0(3)F3(4)","status":"affected"},{"version":"7.0(3)F3(3c)","status":"affected"},{"version":"7.0(3)F3(5)","status":"affected"},{"version":"9.2(1)","status":"affected"},{"version":"9.2(2)","status":"affected"},{"version":"9.2(2t)","status":"affected"},{"version":"9.2(3)","status":"affected"},{"version":"9.2(4)","status":"affected"},{"version":"9.2(2v)","status":"affected"},{"version":"9.3(1)","status":"affected"},{"version":"9.3(2)","status":"affected"},{"version":"9.3(3)","status":"affected"},{"version":"9.3(4)","status":"affected"},{"version":"9.3(5)","status":"affected"},{"version":"9.3(6)","status":"affected"},{"version":"9.3(7)","status":"affected"},{"version":"9.3(7a)","status":"affected"},{"version":"9.3(8)","status":"affected"},{"version":"9.3(9)","status":"affected"},{"version":"9.3(10)","status":"affected"},{"version":"9.3(11)","status":"affected"},{"version":"9.3(12)","status":"affected"},{"version":"10.1(1)","status":"affected"},{"version":"10.1(2)","status":"affected"},{"version":"10.1(2t)","status":"affected"},{"version":"10.2(1)","status":"affected"},{"version":"10.2(1q)","status":"affected"},{"version":"10.2(2)","status":"affected"},{"version":"10.2(3)","status":"affected"},{"version":"10.2(3t)","status":"affected"},{"version":"10.2(4)","status":"affected"},{"version":"10.2(5)","status":"affected"},{"version":"10.2(3v)","status":"affected"},{"version":"10.2(6)","status":"affected"},{"version":"10.3(1)","status":"affected"},{"version":"10.3(2)","status":"affected"},{"version":"10.3(3)","status":"affected"},{"version":"10.3(99w)","status":"affected"},{"version":"10.3(99x)","status":"affected"},{"version":"10.

Initial Analysis by NIST 3/04/2024 5:45:23 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added	CWE		NIST CWE-770
Added	CPE Configuration		Record truncated, showing 2048 of 2556 characters. View Entire Change Record OR cpe:2.3:o:cisco:nx-os:7.0\(3\)f1\(1\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f2\(1\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f2\(2\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f3\(1\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f3\(2\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f3\(3\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f3\(3a\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f3\(3c\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f3\(4\)::::::: cpe:2.3:o:cisco:nx-os:7.0\(3\)f3\(5\)::::::: cpe:2.3:o:cisco:nx-os:9.2\(1\)::::::: cpe:2.3:o:cisco:nx-os:9.2\(2\)::::::: cpe:2.3:o:cisco:nx-os:9.2\(2t\)::::::: cpe:2.3:o:cisco:nx-os:9.2\(2v\)::::::: cpe:2.3:o:cisco:nx-os:9.2\(3\)::::::: cpe:2.3:o:cisco:nx-os:9.2\(4\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(1\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(2\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(3\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(4\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(5\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(6\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(7\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(7a\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(8\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(9\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(10\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(11\)::::::: cpe:2.3:o:cisco:nx-os:9.3\(12\)::::::: cpe:2.3:o:cisco:nx-os:10.1\(1\)::::::: cpe:2.3:o:cisco:nx-os:10.1\(2\)::::::: cpe:2.3:o:cisco:nx-os:10.1\(2t\)::::::: cpe:2.3:o:cisco:nx-os:10.2\(1\)::::::: cpe:2.3:o:cisco:nx-os:10.2\(1q\)::::::: cpe:2.3:o:cisco:nx-os:10.2\(2\)::::::: cpe:2.3:o:cisco:nx-os:10.2\(3\)::::::: cpe:2.3:o:cisco:nx-os:10.2\(3t\)::::::: cpe:2.3:o:cisco:nx-os:10.2\(3v\)::::::: *cpe:2.3:o:
Changed	Reference Type	https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ No Types Assigned	https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ Vendor Advisory

New CVE Received from Cisco Systems, Inc. 2/28/2024 8:43:59 PM

Action	Type	New Value
Added	Description	A vulnerability in the External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue. An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device. A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network.
Added	CVSS V3.1	Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added	CWE	Cisco Systems, Inc. CWE-400
Added	Reference	Cisco Systems, Inc. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ [No types assigned]

Quick Info

CVE Dictionary Entry:
CVE-2024-20321
NVD Published Date:
02/28/2024
NVD Last Modified:
06/17/2026
Source:
Cisco Systems, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2024-20321 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CISA-ADP 6/17/2026 3:06:25 AM

CVE Modified by Cisco Systems, Inc. 6/17/2026 3:06:25 AM

CVE Modified by CVE 11/21/2024 3:52:22 AM

CVE Modified by Cisco Systems, Inc. 5/14/2024 10:50:57 AM

Initial Analysis by NIST 3/04/2024 5:45:23 PM

New CVE Received from Cisco Systems, Inc. 2/28/2024 8:43:59 PM

Quick Info