CVE-2023-0956: External input could be used on TEL-STER TelWin SCADA WebInterface to construct paths to files and directorie

This month

HIGH 7.5REMOTEUPGRADE

CVE-2023-0956 is a high-severity flaw (CVSS 7.5) affecting telwin scada webinterface. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

External input could be used on TEL-STER TelWin SCADA WebInterface to construct paths to files and directories without properly neutralizing special elements within the pathname, which could allow an unauthenticated attacker to read files on the system.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-22
Published	2023-08-03
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: tel-ster

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

Am I affected?

Timeline

2023-08-03 19:15 UTCPublished CVE record published
2026-06-17 05:26 UTCUpdated Record last modified

tel-ster telwin scada webinterface UPGRADE

Affected: >= 3.2 and < 6.2 · >= 7.0 and < 7.2 · 8.0 · 9.0

Fixed in: 6.2, 7.2

Safe to downgrade to: a release before 3.2

1. Check installed version

apt-cache policy telwin-scada-webinterface || rpm -q telwin-scada-webinterface || telwin-scada-webinterface --version

2. UPGRADE to 6.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade telwin-scada-webinterface

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade telwin-scada-webinterface

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 3.2 (Debian / Ubuntu)

apt-cache madison telwin-scada-webinterface sudo apt install telwin-scada-webinterface=<VERSION_BEFORE_3.2> sudo apt-mark hold telwin-scada-webinterface

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

dnf --showduplicates list telwin-scada-webinterface sudo dnf downgrade telwin-scada-webinterface-<VERSION_BEFORE_3.2> sudo dnf versionlock add telwin-scada-webinterface

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-2023-0956?

telwin scada webinterface: upgrade to 6.2, 7.2. Exact commands for each OS are on this page.

Is CVE-2023-0956 being exploited?

CVE-2023-0956 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-2023-0956 affect?

CVE-2023-0956 affects telwin scada webinterface. Severity is high (CVSS 7.5). External input could be used on TEL-STER TelWin SCADA WebInterface to construct paths to files and directories without properly neutralizing special elements within the pathname, which could allow an unauthenticated attacker to read files

How urgent is CVE-2023-0956?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

References

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