How severe is CVE-2024-20291?

CVE-2024-20291 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2024-20291 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-20291?

CVE-2024-20291 primarily affects Cisco Nx-os. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-20291?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-20291 have an EU (EUVD) identifier?

Yes. CVE-2024-20291 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18006.

When was CVE-2024-20291 published?

CVE-2024-20291 was published on 2024-02-29 and last updated on 2026-06-17.

CVE-2024-20291

CVE-2024-20291 is a medium-severity vulnerability in Cisco Nx-os with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-18006
Weakness: CWE-863
Affected product: Cisco Nx-os
Published: 2024-02-29
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2024-20291?: 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.
How severe is CVE-2024-20291?: CVE-2024-20291 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2024-20291 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-20291?: CVE-2024-20291 primarily affects Cisco Nx-os. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-20291?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-20291 have an EU (EUVD) identifier?: Yes. CVE-2024-20291 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18006.
When was CVE-2024-20291 published?: CVE-2024-20291 was published on 2024-02-29 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-po-acl-TkyePgvL

Affected products (3)

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\(12\):*:*:*:*:*:*:*

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