CVE-2024-28286Public exploitNetwork attack vector

Unauthenticated server crash via invalid file-close identifier

Published Mar 20, 2024 · Updated Aug 5, 2024

NULL pointer dereference in libIEC61850 1.4.0 allows remote attackers to crash an MMS server via a crafted file-close request. The MMS file-close handler accepts an unrecognized file-read state-machine identifier, receives a null pointer from getFrsm, and dereferences it without validation. An unauthenticated network client with access to the MMS service can terminate the hosting process, interrupting its embedded application.

CVSS severity7.5
High
EPSS probability0.74%
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 libIEC61850 1.4.0 allows remote attackers to crash an MMS server via a crafted file-close request. The MMS file-close handler accepts an unrecognized file-read state-machine identifier, receives a null pointer from getFrsm, and dereferences it without validation. An unauthenticated network client with access to the MMS service can terminate the hosting process, interrupting its embedded application.

The record

CVE
CVE-2024-28286
Published
Mar 20, 2024
Updated
Aug 5, 2024
Vendor
MZ Automation GmbH
Product
libIEC61850
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2024CVE 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?

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

  1. Affected versionversion=1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MZ Automation GmbH · libIEC61850version=1.4.0

Published CVSS scores

7.5CISA-ADPCVSS: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 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

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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