CVE-2023-50821

MEDIUM

6.2

CVSS Score

Published: April 9, 2024 at 08:34 AM UTC

Updated: June 17, 2026 at 06:40 AM UTC

3 products affected across 1 vendorSIMATIC PCS 7SIMATIC WinCCSIMATIC WinCC Runtime Professional

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Severity

MEDIUM6.2

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

A vulnerability has been identified in SIMATIC PCS 7 V9.1 (All versions < V9.1 SP2 UC04), SIMATIC WinCC Runtime Professional V17 (All versions < V17 Update 8), SIMATIC WinCC Runtime Professional V18 (All versions < V18 Update 4), SIMATIC WinCC Runtime Professional V19 (All versions < V19 Update 1), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 16), SIMATIC WinCC V8.0 (All versions < V8.0 Update 5). The affected products do not properly validate the input provided in the login dialog box. An attacker could leverage this vulnerability to cause a persistent denial of service condition.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SIMATIC PCS 7 · Siemens

60%

v < V9.1 SP2 UC04

Affected range stops below V9.1 SP2 UC04, so it looks safe — our inference, not a vendor statement

SIMATIC WinCC · Siemens

60%

v < V7.5 SP2 Update 16v < V8.0 Update 5

Affected range stops below V7.5 SP2 Update 16, so it looks safe — our inference, not a vendor statement

Affected range stops below V8.0 Update 5, so it looks safe — our inference, not a vendor statement

SIMATIC WinCC Runtime Professional · Siemens

60%

v < V17 Update 8v < V18 Update 4v < V19 Update 1

Affected range stops below V17 Update 8, so it looks safe — our inference, not a vendor statement

Affected range stops below V18 Update 4, so it looks safe — our inference, not a vendor statement

Affected range stops below V19 Update 1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: [email protected]

https://cert-portal.siemens.com/productcert/html/ssa-730482.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.2MEDIUMsiemens

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-120

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