CVE-2022-1261Network attack vector

System-level process execution via exposed IPersistFile functions

Published May 26, 2022 · Updated Apr 16, 2025

Improper access control in all versions of Honeywell Matrikon OPC Server allows remote authenticated users to execute system-level processes. The server exposes IPersistFile functions to low-privileged OPC users and invokes operating system processes with SYSTEM privileges. A low-privileged OPC connection and user interaction are required; successful exploitation permits arbitrary process execution.

CVSS severity5.8
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in all versions of Honeywell Matrikon OPC Server allows remote authenticated users to execute system-level processes. The server exposes IPersistFile functions to low-privileged OPC users and invokes operating system processes with SYSTEM privileges. A low-privileged OPC connection and user interaction are required; successful exploitation permits arbitrary process execution.

The record

CVE
CVE-2022-1261
Published
May 26, 2022
Updated
Apr 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.8ICS-CERTCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A: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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1068Exploitation for Privilege Escalation

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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