CVE-2022-24375Network attack vector

Service interruption via retained session subscriptions

Published Aug 24, 2022 · Updated Sep 16, 2024

Uncontrolled resource consumption in node-opcua before 2.74.0 allows remote attackers to interrupt the OPC UA server service. The server retains subscriptions when repeated CloseSession requests set deleteSubscription to false, allowing session churn to bypass memory limits. No authentication or user interaction is required; sustained requests can exhaust server memory and interrupt service without affecting confidentiality or integrity.

CVSS severity7.5
High
EPSS probability1.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in node-opcua before 2.74.0 allows remote attackers to interrupt the OPC UA server service. The server retains subscriptions when repeated CloseSession requests set deleteSubscription to false, allowing session churn to bypass memory limits. No authentication or user interaction is required; sustained requests can exhaust server memory and interrupt service without affecting confidentiality or integrity.

The record

CVE
CVE-2022-24375
Published
Aug 24, 2022
Updated
Sep 16, 2024
Vendor
Sterfive SAS
Product
node-opcua
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

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  1. Affected versionversion=unspecified <2.74.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sterfive SAS · node-opcuaversion=unspecified <2.74.0

Published CVSS scores

7.5SnykCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Endpoint Denial of Service: Application Exhaustion Flood

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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