CVE-2023-50821

mediumpriority · track · 0EPSS 0.002 · 8 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.18% (8th) EPSS
CVSS 6.2 · medium
Is it mine?
43 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedSIMATIC PCS 7 V9.1siemens_psirt

    Update to V9.1 SP2 UC04 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109812242/
  • FixedSIMATIC WinCC Runtime Professional V17siemens_psirt

    Update to V17 Update 8 or later version

  • FixedSIMATIC WinCC Runtime Professional V18siemens_psirt

    Update to V18 Update 4 or later version

  • FixedSIMATIC WinCC Runtime Professional V19siemens_psirt

    Update to V19 Update 1 or later version

  • FixedSIMATIC WinCC V7.5siemens_psirt

    Update to V7.5 SP2 Update 16 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109793460/
  • FixedSIMATIC WinCC V8.0siemens_psirt

    Update to V8.0 Update 5 or later version

  • FixedSIMATIC PCS 7 V9.1cisa_csaf_ot

    Update to V9.1 SP2 UC04 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109812242/
  • FixedSIMATIC WinCC Runtime Professional V17cisa_csaf_ot

    Update to V17 Update 8 or later version

  • FixedSIMATIC WinCC Runtime Professional V18cisa_csaf_ot

    Update to V18 Update 4 or later version

  • FixedSIMATIC WinCC Runtime Professional V19cisa_csaf_ot

    Update to V19 Update 1 or later version

  • FixedSIMATIC WinCC V7.5cisa_csaf_ot

    Update to V7.5 SP2 Update 16 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109793460/
  • FixedSIMATIC WinCC V8.0cisa_csaf_ot

    Update to V8.0 Update 5 or later version

  • MitigationSIMATIC PCS 7 V9.1siemens_psirt

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC Runtime Professional V17siemens_psirt

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC Runtime Professional V18siemens_psirt

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC Runtime Professional V19siemens_psirt

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC V7.5siemens_psirt

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC V8.0siemens_psirt

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC PCS 7 V9.1cisa_csaf_ot

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC Runtime Professional V17cisa_csaf_ot

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC Runtime Professional V18cisa_csaf_ot

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC Runtime Professional V19cisa_csaf_ot

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC V7.5cisa_csaf_ot

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

  • MitigationSIMATIC WinCC V8.0cisa_csaf_ot

    Activate SIMATIC Logon in the User Administrator of the SIMATIC PCS 7 Operator Stations

02

cvss

Technical severity, 0–10. One row per scoring source.

6.9
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.2mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · productcert@siemens.com DEexploitability 2.5 · impact 3.6
v3.16.2mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.16.2mediumAV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.16.2mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US
v4.06.9mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · productcert@siemens.com DE
v4.06.9mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.04.6mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-120USCWE-120USCWE-120USCWE-120US
05

affected products (43)

Products and version ranges known to be affected.

showing 20 of 43
06

advisories (3)

Vendor and ecosystem advisories describing this.

  • SSA-730482SSA-730482: Denial of Service Vulnerability in SIMATIC WinCC2024-04-09csaf · siemens_psirtDE

    A vulnerability in the login dialog box of SIMATIC WinCC could allow a local attacker to cause a denial of service condition in the runtime of the SCADA system. Siemens has released new versions for the affected products and recommends to update to the latest versions.

  • WID-SEC-W-2024-0817Siemens SIMATIC WinCC: Schwachstelle ermöglicht Denial of ServiceDeutsch2024-04-08csaf · cert_bundDE

    Ein lokaler Angreifer kann eine Schwachstelle in Siemens SIMATIC WinCC ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • ICSA-24-102-02Siemens SIMATIC WinCC2024-04-09icsa · cisa_csaf_otUS

    A vulnerability in the login dialog box of SIMATIC WinCC could allow a local attacker to cause a denial of service condition in the runtime of the SCADA system. Siemens has released new versions for the affected products and recommends to update to the latest versions.

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundcisa_csaf_otsiemens_psirtNVDCVE.orgMITRE
published 2024-04-09modified 2026-06-17
09

references (5)

External citations — patches, advisories, analysis.

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