CVE-2019-20045Network attack vector

Remote service interruption via crafted IEC-104 packets

Published Feb 14, 2020 · Updated Aug 5, 2024

Improper input validation in HUSKY RTU 6049-E70 firmware 5.0 and earlier allows remote attackers to reboot the device via crafted packets. The IEC 60870-5-104 service on TCP port 2404 accepts a malformed packet that can break the authenticated master-slave connection or restart the RTU. No authentication or user interaction is required; exploitation interrupts active control communications or reboots the field device.

CVSS severity7.5
High
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in HUSKY RTU 6049-E70 firmware 5.0 and earlier allows remote attackers to reboot the device via crafted packets. The IEC 60870-5-104 service on TCP port 2404 accepts a malformed packet that can break the authenticated master-slave connection or restart the RTU. No authentication or user interaction is required; exploitation interrupts active control communications or reboots the field device.

The record

CVE
CVE-2019-20045
Published
Feb 14, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 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

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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 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

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T0814Denial 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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