CVE-2019-9011: In Pilz PMC programming tool 3.x before 3.5.17 (based on CODESYS Development System), an attacker can identify

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2019-9011 is a medium-severity flaw (CVSS 5.3) affecting pmc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Pilz PMC programming tool 3.x before 3.5.17 (based on CODESYS Development System), an attacker can identify valid usernames.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-668
Published	2022-12-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pilz

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

Am I affected?

Timeline

2022-12-26 20:15 UTCPublished CVE record published
2026-06-17 02:42 UTCUpdated Record last modified

pilz pmc UPGRADE

Affected: >= 3.0.0 and < 3.5.17

Fixed in: 3.5.17

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to 3.5.17 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pmc

Note

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

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison pmc sudo apt install pmc=<VERSION_BEFORE_3.0.0> sudo apt-mark hold pmc

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pmc sudo dnf downgrade pmc-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add pmc

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2019-9011?

pmc: upgrade to 3.5.17. Exact commands for each OS are on this page.

Is CVE-2019-9011 being exploited?

CVE-2019-9011 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-2019-9011 affect?

CVE-2019-9011 affects pmc. Severity is medium (CVSS 5.3). In Pilz PMC programming tool 3.x before 3.5.17 (based on CODESYS Development System), an attacker can identify valid usernames.

How urgent is CVE-2019-9011?

Priority 34/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-12069 HIGH 7.8 UPGRADE UPGRADE In CODESYS V3 products in all versions prior V3.5.16.0 containing the CmpUserMgr, the CODESYS Control runtime
CVE-2020-12067 HIGH 7.5 UPGRADE In Pilz PMC programming tool 3.x before 3.5.17 (based on CODESYS Development System), a user's password may be

References

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