CVE-2022-2791: Emerson Electric's Proficy Machine Edition Version 9.00 and prior is vulnerable to CWE-434 Unrestricted Upload

Q: How do I fix CVE-2022-2791?

proficy: upgrade to newer than 9.00. Exact commands for each OS are on this page.

Q: Is CVE-2022-2791 being exploited?

CVE-2022-2791 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-2791 affect?

CVE-2022-2791 affects proficy. Severity is medium (CVSS 5.9). Emerson Electric's Proficy Machine Edition Version 9.00 and prior is vulnerable to CWE-434 Unrestricted Upload of File with Dangerous Type, and will upload any file written into the PLC logic folder to the connected PLC.

Q: How urgent is CVE-2022-2791?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.9UPGRADE

CVE-2022-2791 is a medium-severity flaw (CVSS 5.9) affecting proficy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Emerson Electric's Proficy Machine Edition Version 9.00 and prior is vulnerable to CWE-434 Unrestricted Upload of File with Dangerous Type, and will upload any file written into the PLC logic folder to the connected PLC.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-434
Published	2022-11-22
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: emerson

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-11-22 20:15 UTCPublished CVE record published
2026-06-17 04:42 UTCUpdated Record last modified

emerson proficy UPGRADE

Affected: <= 9.00

Fixed in: newer than 9.00

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy proficy || rpm -q proficy || proficy --version

2. UPGRADE to newer than 9.00 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade proficy

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade proficy

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-2791?

proficy: upgrade to newer than 9.00. Exact commands for each OS are on this page.

Is CVE-2022-2791 being exploited?

CVE-2022-2791 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-2791 affect?

CVE-2022-2791 affects proficy. Severity is medium (CVSS 5.9). Emerson Electric's Proficy Machine Edition Version 9.00 and prior is vulnerable to CWE-434 Unrestricted Upload of File with Dangerous Type, and will upload any file written into the PLC logic folder to the connected PLC.

How urgent is CVE-2022-2791?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2019-16353 HIGH 7.5 DOWNGRADE Emerson GE Automation Proficy Machine Edition 8.0 allows an access violation and application crash via crafted

References

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