CVE-2017-14023: An Improper Input Validation issue was discovered in Siemens SIMATIC PCS 7 V8.1 prior to V8.1 SP1 with WinCC V

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MEDIUM 4.9DOWNGRADEDOWNGRADE

CVE-2017-14023 is a medium-severity flaw (CVSS 4.9) affecting simatic pcs7, simatic wincc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Improper Input Validation issue was discovered in Siemens SIMATIC PCS 7 V8.1 prior to V8.1 SP1 with WinCC V7.3 Upd 13, and V8.2 all versions. The improper input validation vulnerability has been identified, which may allow an authenticated remote attacker who is a member of the administrators group to crash services by sending specially crafted messages to the DCOM interface.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-20
Published	2017-11-06
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2017-11-06 22:29 UTCPublished CVE record published
2026-06-17 01:05 UTCUpdated Record last modified

siemens simatic pcs7 DOWNGRADE

Affected: 8.1 · 8.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.1

1. Check installed version

apt-cache policy simatic-pcs7 || rpm -q simatic-pcs7 || simatic-pcs7 --version

2. No fixed release: DOWNGRADE to a release before 8.1 (Debian / Ubuntu)

apt-cache madison simatic-pcs7 sudo apt install simatic-pcs7=<VERSION_BEFORE_8.1> sudo apt-mark hold simatic-pcs7

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list simatic-pcs7 sudo dnf downgrade simatic-pcs7-<VERSION_BEFORE_8.1> sudo dnf versionlock add simatic-pcs7

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.

siemens simatic wincc DOWNGRADE

Affected: 7.3 update13

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.3

1. Check installed version

apt-cache policy simatic-wincc || rpm -q simatic-wincc || simatic-wincc --version

2. No fixed release: DOWNGRADE to a release before 7.3 (Debian / Ubuntu)

apt-cache madison simatic-wincc sudo apt install simatic-wincc=<VERSION_BEFORE_7.3> sudo apt-mark hold simatic-wincc

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list simatic-wincc sudo dnf downgrade simatic-wincc-<VERSION_BEFORE_7.3> sudo dnf versionlock add simatic-wincc

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-2017-14023?

simatic pcs7: downgrade or apply the listed mitigation; simatic wincc: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-14023 being exploited?

CVE-2017-14023 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-2017-14023 affect?

CVE-2017-14023 affects simatic pcs7, simatic wincc. Severity is medium (CVSS 4.9). An Improper Input Validation issue was discovered in Siemens SIMATIC PCS 7 V8.1 prior to V8.1 SP1 with WinCC V7.3 Upd 13, and V8.2 all versions. The improper input validation vulnerability has been identified, which may allow an authenticat

How urgent is CVE-2017-14023?

Priority 40/100. No elevated risk signals yet.

Software pages

Siemens vulnerabilities

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References

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