CVE-2022-1261
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMatrikon, a subsidary of Honeywell Matrikon OPC Server (all versions) is vulnerable to a condition where a low privileged user allowed to connect to the OPC server to use the functions of the IPersisFile to execute operating system processes with system-level privileges.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThe Matrikon OPC Server (all versions) contains a privilege escalation vulnerability where a low-privileged user with network access to the OPC server can abuse the IPersisFile interface functions to execute operating system processes with SYSTEM-level privileges, effectively gaining full control of the host.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Matrikon OPC Server installationCheck for Matrikon OPC Server in Windows Programs and Features, or search for 'Matrikon' in installed programs directory (typically C:\Program Files\Matrikon or C:\Program Files (x86)\Matrikon)Affected if Matrikon OPC Server is present on the system
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Identify the OPC Server service accountOpen Services console, locate the Matrikon OPC service, right-click and select Properties, then check the 'Log On' accountAffected if The service runs under SYSTEM, a local administrator account, or any privileged domain account
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Verify network exposure of the OPC serverCheck OPC server configuration for enabled network listeners. Review Windows Firewall rules or third-party firewall for rules allowing inbound connections to OPC server ports (typically DCOM ports 135, and dynamic ports 49152-65535)Affected if The OPC server accepts remote connections from network clients
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Assess user access to the OPC serverReview OPC server security settings and Windows user/group permissions on the server. Check if standard users or low-privilege accounts have OPC client access rightsAffected if Non-administrative or low-privilege users have network access to connect to the OPC server
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Verify IPersisFile interface availabilityCheck OPC server documentation or configuration for IPersisFile interface exposure. This is typically exposed via DCOM for remote accessAffected if The IPersisFile interface is enabled and accessible for remote procedure calls
A user is affected if Matrikon OPC Server is installed, runs under a privileged account, and allows network access from low-privileged users who could invoke the IPersisFile interface.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataRestrict OPC server connectivity to authorized administrative users only, implement strict access control lists, and contact Honeywell Matrikon for available patches or hardening guidance. Consider network segmentation to limit exposure.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-1261 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-1261 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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