CVE-2022-1748Network attack vector

Unauthenticated server crash via unfinished OPC UA methods

Published Aug 17, 2022 · Updated Apr 16, 2025

NULL pointer dereference in affected Softing OPC UA server products allows remote attackers to crash the application through OPC UA calls. The server retains unfinished ResendData or GetMonitoredItems calls after their OPC UA session closes, then accesses a null pointer during completion. An established OPC UA session is required, but it can be unauthenticated; exploitation interrupts availability without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.98%
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 affected Softing OPC UA server products allows remote attackers to crash the application through OPC UA calls. The server retains unfinished ResendData or GetMonitoredItems calls after their OPC UA session closes, then accesses a null pointer during completion. An established OPC UA session is required, but it can be unauthenticated; exploitation interrupts availability without reported data disclosure or modification.

The record

CVE
CVE-2022-1748
Published
Aug 17, 2022
Updated
Apr 16, 2025
Vendor
Softing Industrial Automation GmbH
Product
OPC UA C++ SDK
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 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?

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

  1. Affected versionversion=V6.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Softing Industrial Automation GmbH · OPC UA C++ SDKversion=V6.00
Softing Industrial Automation GmbH · edgeConnector Modbusversion=V3.10
Softing Industrial Automation GmbH · edgeConnector 840Dversion=V3.10
Softing Industrial Automation GmbH · edgeAggregatorversion=V3.10
Softing Industrial Automation GmbH · edgeConnector Siemensversion=V3.10
Softing Industrial Automation GmbH · Secure Integration Serverversion=V1.22

Published CVSS scores

7.5ICS-CERTCVSS: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 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-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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