CVE-2023-27772Public exploitNetwork attack vector

Client crash via unchecked null control object

Published Apr 13, 2023 · Updated Feb 7, 2025

NULL-pointer dereference in MZ Automation libiec61850 1.5.1 allows remote attackers to crash the bundled example client process. The example passes a null result from ControlObjectClient_create to ControlObjectClient_setOrigin without checking whether the requested control object exists. Reachability requires the example client to connect to a server lacking its hard-coded control object; the demonstrated consequence is limited to that client process crashing.

CVSS severity7.5
High
EPSS probability0.91%
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 MZ Automation libiec61850 1.5.1 allows remote attackers to crash the bundled example client process. The example passes a null result from ControlObjectClient_create to ControlObjectClient_setOrigin without checking whether the requested control object exists. Reachability requires the example client to connect to a server lacking its hard-coded control object; the demonstrated consequence is limited to that client process crashing.

The record

CVE
CVE-2023-27772
Published
Apr 13, 2023
Updated
Feb 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-754, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 7, 2025Record 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

7.5CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NVDCVSS: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.

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

CWE-754Improper Check for Unusual or Exceptional Conditions
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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