CVE-2022-31801: An unauthenticated, remote attacker could upload malicious logic to the devices based on ProConOS/ProConOS eCL

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CRITICAL 9.8REMOTEMITIGATEMITIGATEMITIGATE

CVE-2022-31801 is a critical-severity flaw (CVSS 9.8) affecting multiprog, proconos, proconos eclr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An unauthenticated, remote attacker could upload malicious logic to the devices based on ProConOS/ProConOS eCLR in order to gain full control over the device.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 33%)
CISA exploited list	No
Weakness	CWE-345
Published	2022-06-21
Last modified	2026-06-17

Publisher (CNA): CERT VDE · Vendor: phoenixcontact · phoenixcontact-software

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

Am I affected?

Timeline

2022-06-21 08:15 UTCPublished CVE record published
2026-06-17 04:46 UTCUpdated Record last modified

phoenixcontact multiprog MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

phoenixcontact proconos MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

phoenixcontact-software proconos eclr MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-31801?

multiprog: mitigate or apply the listed mitigation; proconos: mitigate or apply the listed mitigation; proconos eclr: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-31801 being exploited?

CVE-2022-31801 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-2022-31801 affect?

CVE-2022-31801 affects multiprog, proconos, proconos eclr. Severity is critical (CVSS 9.8). An unauthenticated, remote attacker could upload malicious logic to the devices based on ProConOS/ProConOS eCLR in order to gain full control over the device.

How urgent is CVE-2022-31801?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-5592 HIGH 7.5 MITIGATE MITIGATE Download of Code Without Integrity Check vulnerability in PHOENIX CONTACT MULTIPROG, PHOENIX CONTACT ProConOS
CVE-2023-0757 CRITICAL 9.8 MITIGATE MITIGATE Incorrect Permission Assignment for Critical Resource vulnerability in PHOENIX CONTACT MULTIPROG, PHOENIX CONT

References

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