CVE-2018-5951

Name: CVE-2018-5951
Creator: NVD / NIST
Published: 2020-03-02T22:15:12.827+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.27%

Last modified Jun 17, 2026

CVE-2018-5951 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Mikrotik RouterOS. Crafting a packet that has a size of 1 byte and sending it to an IPv6 address of a RouterOS box with IP Protocol 97 will cause RouterOS to reboot imminently. EPSS estimates a 4.27% chance of exploitation in the next 30 days.

Description

An issue was discovered in Mikrotik RouterOS. Crafting a packet that has a size of 1 byte and sending it to an IPv6 address of a RouterOS box with IP Protocol 97 will cause RouterOS to reboot imminently. All versions of RouterOS that supports EoIPv6 are vulnerable to this attack.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

4.27%

89.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mikrotik	Routeros	All versions

References

https://github.com/Nat-Lab/CVE-2018-5951Exploit, Third Party Advisory
https://github.com/Nat-Lab/CVE-2018-5951Exploit, Third Party Advisory

Timeline

Published: Mar 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5951?

How severe is CVE-2018-5951?

CVE-2018-5951 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.27% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5951?

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.

How Strix Helps

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Source: NVD / NIST