CVE-2026-0393: The affected product may expose credentials remotely between low privileged visualization users during concurr

Routine

MEDIUM 6.5UPGRADE

CVE-2026-0393 is a medium-severity flaw (CVSS 6.5) affecting visualization. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The affected product may expose credentials remotely between low privileged visualization users during concurrent login operations due to insufficient isolation of authentication data. The vulnerability affects only login operations within an active visualization session.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-522
Published	2026-05-21
Last modified	2026-07-23

Publisher (CNA): CERT VDE · Vendor: codesys

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-21 12:16 UTCPublished CVE record published
2026-07-23 16:10 UTCUpdated Record last modified

codesys visualization UPGRADE

Affected: >= 1.0.0.0 and < 4.10.0.0

Fixed in: 4.10.0.0

Safe to downgrade to: a release before 1.0.0.0

1. Check installed version

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

2. UPGRADE to 4.10.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade visualization

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 1.0.0.0 (Debian / Ubuntu)

apt-cache madison visualization sudo apt install visualization=<VERSION_BEFORE_1.0.0.0> sudo apt-mark hold visualization

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

dnf --showduplicates list visualization sudo dnf downgrade visualization-<VERSION_BEFORE_1.0.0.0> sudo dnf versionlock add visualization

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-2026-0393?

visualization: upgrade to 4.10.0.0. Exact commands for each OS are on this page.

Is CVE-2026-0393 being exploited?

CVE-2026-0393 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-2026-0393 affect?

CVE-2026-0393 affects visualization. Severity is medium (CVSS 6.5). The affected product may expose credentials remotely between low privileged visualization users during concurrent login operations due to insufficient isolation of authentication data. The vulnerability affects only login operations within

How urgent is CVE-2026-0393?

Priority 27/100. No elevated risk signals yet.

References

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