CVE-2022-2790

PLC project tampering via unverified signatures

Published Aug 19, 2022 · Updated Apr 16, 2025

Improper signature verification in Emerson PAC Machine Edition 9.00 and earlier allows local users to alter PLC project logic and data. PDT, BLD, and BLK file handling fails to verify cryptographic signatures on compiled logic and data-block content. Exploitation requires low-privilege local access and user interaction, and the reported consequence is limited to PLC project integrity.

CVSS severity5.9
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in Emerson PAC Machine Edition 9.00 and earlier allows local users to alter PLC project logic and data. PDT, BLD, and BLK file handling fails to verify cryptographic signatures on compiled logic and data-block content. Exploitation requires low-privilege local access and user interaction, and the reported consequence is limited to PLC project integrity.

The record

CVE
CVE-2022-2790
Published
Aug 19, 2022
Updated
Apr 16, 2025
Vendor
Emerson Electric Co.
Product
PAC Machine Edition
Classifications
CWE-347, T1204.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 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?

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

  1. Affected versionversion=all <=9.00

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Emerson Electric Co. · PAC Machine Editionversion=all <=9.00

Published CVSS scores

5.9ICS-CERTCVSS:3.1/AV:L/AC:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1204.002Malicious File

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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