CVE-2024-20267

Name: CVE-2024-20267
Creator: NVD / NIST
Published: 2024-02-29T01:43:58.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2024-20267 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability with the handling of MPLS traffic for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the netstack process to unexpectedly restart, which could cause the device to stop processing network traffic or to reload. This vulnerability is due to lack of proper error checking when processing an ingress MPLS frame. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

A vulnerability with the handling of MPLS traffic for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the netstack process to unexpectedly restart, which could cause the device to stop processing network traffic or to reload. This vulnerability is due to lack of proper error checking when processing an ingress MPLS frame. An attacker could exploit this vulnerability by sending a crafted IPv6 packet that is encapsulated within an MPLS frame to an MPLS-enabled interface of the targeted device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition. Note: The IPv6 packet can be generated multiple hops away from the targeted device and then encapsulated within MPLS. The DoS condition may occur when the NX-OS device processes the packet.

Metrics

CVSS 3.1

8.6/10

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

EPSS Probability

0.93%

55.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Nx-Os	6.0\(2\)a3\(1\)
Cisco	Nx-Os	6.0\(2\)a3\(2\)
Cisco	Nx-Os	6.0\(2\)a3\(4\)
Cisco	Nx-Os	6.0\(2\)a4\(1\)
Cisco	Nx-Os	6.0\(2\)a4\(2\)
Cisco	Nx-Os	6.0\(2\)a4\(3\)
Cisco	Nx-Os	6.0\(2\)a4\(4\)
Cisco	Nx-Os	6.0\(2\)a4\(5\)
Cisco	Nx-Os	6.0\(2\)a4\(6\)
Cisco	Nx-Os	6.0\(2\)a6\(1\)
Cisco	Nx-Os	6.0\(2\)a6\(1a\)
Cisco	Nx-Os	6.0\(2\)a6\(2\)
Cisco	Nx-Os	6.0\(2\)a6\(2a\)
Cisco	Nx-Os	6.0\(2\)a6\(3\)
Cisco	Nx-Os	6.0\(2\)a6\(3a\)
Cisco	Nx-Os	6.0\(2\)a6\(4\)
Cisco	Nx-Os	6.0\(2\)a6\(4a\)
Cisco	Nx-Os	6.0\(2\)a6\(5\)
Cisco	Nx-Os	6.0\(2\)a6\(5a\)
Cisco	Nx-Os	6.0\(2\)a6\(5b\)
Cisco	Nx-Os	6.0\(2\)a6\(6\)
Cisco	Nx-Os	6.0\(2\)a6\(7\)
Cisco	Nx-Os	6.0\(2\)a6\(8\)
Cisco	Nx-Os	6.0\(2\)a7\(1\)
Cisco	Nx-Os	6.0\(2\)a7\(1a\)
Cisco	Nx-Os	6.0\(2\)a7\(2\)
Cisco	Nx-Os	6.0\(2\)a7\(2a\)
Cisco	Nx-Os	6.0\(2\)a8\(1\)
Cisco	Nx-Os	6.0\(2\)a8\(2\)
Cisco	Nx-Os	6.0\(2\)a8\(3\)
Cisco	Nx-Os	6.0\(2\)a8\(4\)
Cisco	Nx-Os	6.0\(2\)a8\(4a\)
Cisco	Nx-Os	6.0\(2\)a8\(5\)
Cisco	Nx-Os	6.0\(2\)a8\(6\)
Cisco	Nx-Os	6.0\(2\)a8\(7\)
Cisco	Nx-Os	6.0\(2\)a8\(7a\)
Cisco	Nx-Os	6.0\(2\)a8\(7b\)
Cisco	Nx-Os	6.0\(2\)a8\(8\)
Cisco	Nx-Os	6.0\(2\)a8\(9\)
Cisco	Nx-Os	6.0\(2\)a8\(10\)
Cisco	Nx-Os	6.0\(2\)a8\(10a\)
Cisco	Nx-Os	6.0\(2\)a8\(11\)
Cisco	Nx-Os	6.0\(2\)a8\(11a\)
Cisco	Nx-Os	6.0\(2\)a8\(11b\)
Cisco	Nx-Os	6.0\(2\)u2\(1\)
Cisco	Nx-Os	6.0\(2\)u2\(2\)
Cisco	Nx-Os	6.0\(2\)u2\(3\)
Cisco	Nx-Os	6.0\(2\)u2\(4\)
Cisco	Nx-Os	6.0\(2\)u2\(5\)
Cisco	Nx-Os	6.0\(2\)u2\(6\)

Showing 50 of 205 affected configurations. See NVD for the full list.

References

Timeline

Published: Feb 29, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-20267?

How severe is CVE-2024-20267?

CVE-2024-20267 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2024-20267?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-20267?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST