CVE-2020-27220Network attack vector

Cross-device command disclosure via missing authorization

Published Jan 14, 2021 · Updated Aug 4, 2024

Missing authorization in Eclipse Hono 1.4.0 through 1.4.4 and 1.5.0 allows remote authenticated users to receive other devices' commands. The AMQP and MQTT protocol adapters fail to verify that a gateway device is authorized to act for the command's target device when subscriptions are scoped to that device. The attacker must authenticate as a device in the same tenant; unauthorized command-and-control messages can then be disclosed to that device.

CVSS severity8.8
High
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Eclipse Hono 1.4.0 through 1.4.4 and 1.5.0 allows remote authenticated users to receive other devices' commands. The AMQP and MQTT protocol adapters fail to verify that a gateway device is authorized to act for the command's target device when subscriptions are scoped to that device. The attacker must authenticate as a device in the same tenant; unauthorized command-and-control messages can then be disclosed to that device.

The record

CVE
CVE-2020-27220
Published
Jan 14, 2021
Updated
Aug 4, 2024
Vendor
The Eclipse Foundation
Product
Eclipse Hono
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.4.0 to 1.4.4 inclusive, 1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Eclipse Foundation · Eclipse Honoversion=1.4.0 to 1.4.4 inclusive, 1.5.0

Published CVSS scores

9.0NVDAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-862Missing Authorization

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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