CVE-2022-21208Network attack vector

Service interruption via unbounded message chunk accumulation

Published Aug 23, 2022 · Updated Sep 16, 2024

Uncontrolled resource consumption in Sterfive SAS node-opcua before 2.74.0 allows remote attackers to interrupt OPC UA services. The message-builder path retains an unbounded sequence of oversized continuation chunks while awaiting a final chunk. No authentication or user interaction is required; sustained crafted traffic exhausts memory and can terminate the Node.js service.

CVSS severity7.5
High
EPSS probability1.58%
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 Sterfive SAS node-opcua before 2.74.0 allows remote attackers to interrupt OPC UA services. The message-builder path retains an unbounded sequence of oversized continuation chunks while awaiting a final chunk. No authentication or user interaction is required; sustained crafted traffic exhausts memory and can terminate the Node.js service.

The record

CVE
CVE-2022-21208
Published
Aug 23, 2022
Updated
Sep 16, 2024
Vendor
Sterfive SAS
Product
node-opcua
Classifications
CWE-400, CWE-1284, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 23, 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?

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

  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

7.5GitHub Advisory DatabaseCVSS: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-400Uncontrolled Resource Consumption
CWE-1284Improper Validation of Specified Quantity in Input
T1499.003Application Exhaustion Flood

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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