CVE-2020-20216Network attack vector

Authenticated graphing-process crash via crafted packet

Published Jul 7, 2021 · Updated Aug 4, 2024

NULL pointer dereference in MikroTik RouterOS 6.44.6 allows remote authenticated users to crash the graphing process via a crafted packet. The /nova/bin/graphing process mishandles the packet and dereferences a NULL pointer; the disclosure does not identify the malformed field or parsing routine. Authenticated access is required, and the demonstrated consequence is limited to interruption of the graphing process rather than a full device reboot.

CVSS severity6.5
Medium
EPSS probability1.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in MikroTik RouterOS 6.44.6 allows remote authenticated users to crash the graphing process via a crafted packet. The /nova/bin/graphing process mishandles the packet and dereferences a NULL pointer; the disclosure does not identify the malformed field or parsing routine. Authenticated access is required, and the demonstrated consequence is limited to interruption of the graphing process rather than a full device reboot.

The record

CVE
CVE-2020-20216
Published
Jul 7, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0NVDAV:N/AC:L/Au:S/C:N/I:N/A:P
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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