CVE-2018-5951Public exploitNetwork attack vector

Unauthenticated reboot via unchecked EtherIP packet length

Published Mar 2, 2020 · Updated Aug 5, 2024

Denial of service in MikroTik RouterOS with EoIPv6 support allows remote attackers to reboot routers via a one-byte IPv6 protocol 97 packet. RouterOS parses the modified EtherIP header to recover a tunnel ID without first verifying that the payload contains the required bits. The faulty path is reachable when IPv6 is enabled, protocol 97 input is unfiltered, and any tunnel interface exists, even if disabled.

CVSS severity7.5
High
EPSS probability4.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in MikroTik RouterOS with EoIPv6 support allows remote attackers to reboot routers via a one-byte IPv6 protocol 97 packet. RouterOS parses the modified EtherIP header to recover a tunnel ID without first verifying that the payload contains the required bits. The faulty path is reachable when IPv6 is enabled, protocol 97 input is unfiltered, and any tunnel interface exists, even if disabled.

The record

CVE
CVE-2018-5951
Published
Mar 2, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 2, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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