CVE-2021-42698

Memory corruption via unsafe project-file deserialization

Published Nov 5, 2021 · Updated Aug 4, 2024

Unsafe deserialization in AzeoTech DAQFactory 18.1 Build 2347 and earlier allows attackers to corrupt memory through a crafted project file. The project-file loader reconstructs in-memory objects from binary serialized data without safely rejecting maliciously altered object data. Exploitation requires a victim to open the file locally, and the published impact is memory corruption rather than a demonstrated code-execution path.

CVSS severity7.8
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in AzeoTech DAQFactory 18.1 Build 2347 and earlier allows attackers to corrupt memory through a crafted project file. The project-file loader reconstructs in-memory objects from binary serialized data without safely rejecting maliciously altered object data. Exploitation requires a victim to open the file locally, and the published impact is memory corruption rather than a demonstrated code-execution path.

The record

CVE
CVE-2021-42698
Published
Nov 5, 2021
Updated
Aug 4, 2024
Vendor
AzeoTech
Product
DAQFactory
Classifications
CWE-502, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=All versions <=New version

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

AzeoTech · DAQFactoryversion=All versions <=New version

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8ICS-CERTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002Malicious File

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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