CVE-2025-66590

Code execution via unvalidated CTL file parsing

Published Dec 11, 2025 · Updated Dec 11, 2025

Out-of-bounds write in AzeoTech DAQFactory 20.7 (Build 2555) allows remote attackers to execute code via a crafted CTL file. The CTL file parser fails to validate user-supplied data before writing beyond the end of an allocated buffer, corrupting process memory. Exploitation requires the target to open the file or visit a malicious page, and code runs in the current process; a crash is also possible.

CVSS severity8.4
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in AzeoTech DAQFactory 20.7 (Build 2555) allows remote attackers to execute code via a crafted CTL file. The CTL file parser fails to validate user-supplied data before writing beyond the end of an allocated buffer, corrupting process memory. Exploitation requires the target to open the file or visit a malicious page, and code runs in the current process; a crash is also possible.

The record

CVE
CVE-2025-66590
Published
Dec 11, 2025
Updated
Dec 11, 2025
Vendor
AzeoTech
Product
DAQFactory
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 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=0 <=Release 20.7 (Build 2555)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

AzeoTech · DAQFactoryversion=0 <=Release 20.7 (Build 2555)

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8ICS-CERTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.4ICS-CERTCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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