# What is CVE-2024-20291? > CVE-2024-20291 is a medium-severity flaw (CVSS 5.8) in NX-OS from Cisco, published on 29 February 2024. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.9%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.edgeprotect.io/what-is/cve-2024-20291 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **EdgeProtect risk score:** 30 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.8 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.9% (latest exploit-likelihood forecast) - **Published:** 29 February 2024 - **Record last updated:** 30 April 2025 - **Main product:** NX-OS from Cisco - **Affected products:** 81 ## What is CVE-2024-20291? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can change some data. ### The official 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. ### What kind of flaw is it? - CWE-284: Improper Access Control - CWE-863: Incorrect Authorization ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can change some data Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N` ## Is CVE-2024-20291 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.9%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.9%, 0.9%, 0.9%, 0.9%, 0.9%, 0.9%, 0.9%. ### Timeline - 29 February 2024: Published - 30 April 2025: Record last updated - 16 June 2026: Exploit likelihood fell ### How EdgeProtect ranks it CVE-2024-20291 scores **30 out of 100 (Low)**, with the action "Monitor". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: key context - Real threat activity around it: key context 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2024-20291? The published record lists 81 products. - [NX-OS](https://www.edgeprotect.io/product/cisco/nx-os) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Operating system): 9.3(10), 9.3(11), 9.3(12) - [Nexus 3000 in Standalone NX-OS Mode](https://www.edgeprotect.io/product/cisco/nexus_3000_in_standalone_nx-os_mode) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3048](https://www.edgeprotect.io/product/cisco/nexus_3048) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 31108pc-V](https://www.edgeprotect.io/product/cisco/nexus_31108pc-v) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 31108tc-V](https://www.edgeprotect.io/product/cisco/nexus_31108tc-v) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 31128pq](https://www.edgeprotect.io/product/cisco/nexus_31128pq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3132c-Z](https://www.edgeprotect.io/product/cisco/nexus_3132c-z) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3132q-V](https://www.edgeprotect.io/product/cisco/nexus_3132q-v) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3132q-Xl](https://www.edgeprotect.io/product/cisco/nexus_3132q-xl) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3164q](https://www.edgeprotect.io/product/cisco/nexus_3164q) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3172pq](https://www.edgeprotect.io/product/cisco/nexus_3172pq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3172pq-Xl](https://www.edgeprotect.io/product/cisco/nexus_3172pq-xl) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3172tq](https://www.edgeprotect.io/product/cisco/nexus_3172tq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3172tq-32t](https://www.edgeprotect.io/product/cisco/nexus_3172tq-32t) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3172tq-Xl](https://www.edgeprotect.io/product/cisco/nexus_3172tq-xl) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3232c](https://www.edgeprotect.io/product/cisco/nexus_3232c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3264c-E](https://www.edgeprotect.io/product/cisco/nexus_3264c-e) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3264q](https://www.edgeprotect.io/product/cisco/nexus_3264q) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3408-S](https://www.edgeprotect.io/product/cisco/nexus_3408-s) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 34180yc](https://www.edgeprotect.io/product/cisco/nexus_34180yc) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 34200yc-Sm](https://www.edgeprotect.io/product/cisco/nexus_34200yc-sm) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3432d-S](https://www.edgeprotect.io/product/cisco/nexus_3432d-s) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3464c](https://www.edgeprotect.io/product/cisco/nexus_3464c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3524-X](https://www.edgeprotect.io/product/cisco/nexus_3524-x) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3524-Xl](https://www.edgeprotect.io/product/cisco/nexus_3524-xl) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3548-X](https://www.edgeprotect.io/product/cisco/nexus_3548-x) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 3548-Xl](https://www.edgeprotect.io/product/cisco/nexus_3548-xl) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 36180yc-R](https://www.edgeprotect.io/product/cisco/nexus_36180yc-r) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9000 in Standalone NX-OS Mode](https://www.edgeprotect.io/product/cisco/nexus_9000_in_standalone_nx-os_mode) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9000v](https://www.edgeprotect.io/product/cisco/nexus_9000v) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 92160yc-X](https://www.edgeprotect.io/product/cisco/nexus_92160yc-x) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 92300yc](https://www.edgeprotect.io/product/cisco/nexus_92300yc) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 92304qc](https://www.edgeprotect.io/product/cisco/nexus_92304qc) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 92348gc-Fx3](https://www.edgeprotect.io/product/cisco/nexus_92348gc-fx3) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 92348gc-X](https://www.edgeprotect.io/product/cisco/nexus_92348gc-x) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9236c](https://www.edgeprotect.io/product/cisco/nexus_9236c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9272q](https://www.edgeprotect.io/product/cisco/nexus_9272q) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93108tc-EX](https://www.edgeprotect.io/product/cisco/nexus_93108tc-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93108tc-EX-24](https://www.edgeprotect.io/product/cisco/nexus_93108tc-ex-24) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93108tc-Fx](https://www.edgeprotect.io/product/cisco/nexus_93108tc-fx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93108tc-Fx-24](https://www.edgeprotect.io/product/cisco/nexus_93108tc-fx-24) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93108tc-Fx3](https://www.edgeprotect.io/product/cisco/nexus_93108tc-fx3) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93108tc-Fx3h](https://www.edgeprotect.io/product/cisco/nexus_93108tc-fx3h) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93108tc-Fx3p](https://www.edgeprotect.io/product/cisco/nexus_93108tc-fx3p) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93120tx](https://www.edgeprotect.io/product/cisco/nexus_93120tx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9316d-Gx](https://www.edgeprotect.io/product/cisco/nexus_9316d-gx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180lc-EX](https://www.edgeprotect.io/product/cisco/nexus_93180lc-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180yc-EX](https://www.edgeprotect.io/product/cisco/nexus_93180yc-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180yc-EX-24](https://www.edgeprotect.io/product/cisco/nexus_93180yc-ex-24) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180yc-Fx](https://www.edgeprotect.io/product/cisco/nexus_93180yc-fx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180yc-Fx-24](https://www.edgeprotect.io/product/cisco/nexus_93180yc-fx-24) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180yc-Fx3](https://www.edgeprotect.io/product/cisco/nexus_93180yc-fx3) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180yc-Fx3h](https://www.edgeprotect.io/product/cisco/nexus_93180yc-fx3h) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93180yc-Fx3s](https://www.edgeprotect.io/product/cisco/nexus_93180yc-fx3s) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93216tc-Fx2](https://www.edgeprotect.io/product/cisco/nexus_93216tc-fx2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93240yc-Fx2](https://www.edgeprotect.io/product/cisco/nexus_93240yc-fx2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9332c](https://www.edgeprotect.io/product/cisco/nexus_9332c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9332d-Gx2b](https://www.edgeprotect.io/product/cisco/nexus_9332d-gx2b) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9332d-H2r](https://www.edgeprotect.io/product/cisco/nexus_9332d-h2r) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9332pq](https://www.edgeprotect.io/product/cisco/nexus_9332pq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93360yc-Fx2](https://www.edgeprotect.io/product/cisco/nexus_93360yc-fx2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9336c-Fx2](https://www.edgeprotect.io/product/cisco/nexus_9336c-fx2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9336c-Fx2-E](https://www.edgeprotect.io/product/cisco/nexus_9336c-fx2-e) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9336pq ACI Spine](https://www.edgeprotect.io/product/cisco/nexus_9336pq_aci_spine) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93400ld-H1](https://www.edgeprotect.io/product/cisco/nexus_93400ld-h1) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9348d-Gx2a](https://www.edgeprotect.io/product/cisco/nexus_9348d-gx2a) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9348gc-Fx3](https://www.edgeprotect.io/product/cisco/nexus_9348gc-fx3) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9348gc-Fxp](https://www.edgeprotect.io/product/cisco/nexus_9348gc-fxp) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 93600cd-Gx](https://www.edgeprotect.io/product/cisco/nexus_93600cd-gx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9364c](https://www.edgeprotect.io/product/cisco/nexus_9364c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9364c-Gx](https://www.edgeprotect.io/product/cisco/nexus_9364c-gx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9364c-H1](https://www.edgeprotect.io/product/cisco/nexus_9364c-h1) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9364d-Gx2a](https://www.edgeprotect.io/product/cisco/nexus_9364d-gx2a) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9364e-Sg2](https://www.edgeprotect.io/product/cisco/nexus_9364e-sg2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9372px-E](https://www.edgeprotect.io/product/cisco/nexus_9372px-e) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9372tx-E](https://www.edgeprotect.io/product/cisco/nexus_9372tx-e) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9396tx](https://www.edgeprotect.io/product/cisco/nexus_9396tx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9408](https://www.edgeprotect.io/product/cisco/nexus_9408) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9508](https://www.edgeprotect.io/product/cisco/nexus_9508) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9804](https://www.edgeprotect.io/product/cisco/nexus_9804) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified - [Nexus 9808](https://www.edgeprotect.io/product/cisco/nexus_9808) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified ## How do I fix CVE-2024-20291? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? EdgeProtect can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-po-acl-TkyePgvL) (Vendor advisory) ## Questions ### What is CVE-2024-20291? CVE-2024-20291 is a medium-severity flaw in NX-OS from Cisco, published on 29 February 2024. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can change some data. ### How serious is CVE-2024-20291? It scores 5.8 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2024-20291 is 30 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2024-20291 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.9%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2024-20291 affect? For NX-OS from Cisco: 9.3(10), 9.3(11), 9.3(12). The record lists 81 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2024-20291? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2024-20291 affect you? EdgeProtect keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.edgeprotect.io/register Book a demo: https://www.edgeprotect.io/contact