THREATPORT/VULNERABILITY/CVE-2018-5951
HIGH SEVERITY

CVE-2018-5951

Routeros vulnerability

CVSS
7.5
EPSS
4.3%
EPSS pct
90th
Exploited
No known
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.
Affected vendor
Mikrotik
Affected product
Routeros
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2020-03-02

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 4.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2018-5951

  • Confirm whether Mikrotik Routeros is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-5951.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-5951

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-5951 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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