CVE-2024-20291

mediumpriority · track · 23OT risk · elevatedEPSS 0.009 · 59 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.89% (59th) EPSS

CVSS 5.8 · medium

Is it mine?

15 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-26

A vulnerability in the access control list (ACL) programming for port channel subinterfaces of Cisco Nexus 3000 and 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, remote attacker to send traffic that should be blocked through an affected device. This vulnerability is due to incorrect hardware programming that occurs when configuration changes are made to port channel member ports. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to access network resources that should be protected by an ACL that was applied on port channel subinterfaces.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco NX-OS Software 9.3(10) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco NX-OS Software 9.3(10) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco NX-OS Software 9.3(11) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco NX-OS Software 9.3(11) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco NX-OS Software 9.3(12) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco NX-OS Software 9.3(12) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

5.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · ENISA EU

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · psirt@cisco.com USexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · Cisco PSIRT US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USprimaryCWE-284USCWE-284US

affected products (15)

Products and version ranges known to be affected.

Cisco NX-OS Software 9.3(10) when installed on Cisco Nexus 3000 Series Switchesall versionscisco_csafUS
Cisco NX-OS Software 9.3(10) when installed on Cisco Nexus 9000 Series Switchesall versionscisco_csafUS
Cisco NX-OS Software 9.3(11) when installed on Cisco Nexus 3000 Series Switchesall versionscisco_csafUS
Cisco NX-OS Software 9.3(11) when installed on Cisco Nexus 9000 Series Switchesall versionscisco_csafUS
Cisco NX-OS Software 9.3(12) when installed on Cisco Nexus 3000 Series Switchesall versionscisco_csafUS
Cisco NX-OS Software 9.3(12) when installed on Cisco Nexus 9000 Series Switchesall versionscisco_csafUS
Cisco Cisco NX-OS Software≤ 9.3(11)enisa_euvdEU
Cisco Cisco NX-OS Software≤ 9.3(10)enisa_euvdEU
Cisco Cisco NX-OS Software≤ 9.3(12)enisa_euvdEU
Cisco Systems Inc. NX-OS≤ 9.3(12)fstec_bduRU
Cisco Systems Inc. NX-OS≤ 9.3(11)fstec_bduRU
Cisco Systems Inc. NX-OS≤ 9.3(10)fstec_bduRU
cisco nx-os= 9.3(10)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 9.3(11)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 9.3(12)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-0504Cisco Nexus: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2024-02-28csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco Nexus ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
cisco-sa-nxos-po-acl-TkyePgvLCisco Nexus 3000 and 9000 Series Switches Port Channel ACL Programming Vulnerability2024-02-28csaf · cisco_csafUS
A vulnerability in the access control list (ACL) programming for port channel subinterfaces of Cisco Nexus 3000 and 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, remote attacker to send traffic that should be blocked through an affected device. This vulnerability is due to incorrect hardware programming that occurs when configuration changes are made to port channel member ports. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to access network resources that should be protected by an ACL that was applied on port channel subinterfaces. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is part of the February 2024 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: February 2024 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75059"].

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd cert_bund NVD CVE.org MITRE

published 2024-02-29modified 2026-06-17

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+4993 more

references (5)

External citations — patches, advisories, analysis.

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