CVE-2023-30756

mediumpriority · track · 0EPSS 0.005 · 38 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.45% (38th) EPSS

CVSS 5.9 · medium

Is it mine?

85 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-22

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-7 LTE (All versions < V3.5.20), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.5.20), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions), SIMATIC IPC DiagBase (All versions), SIMATIC IPC DiagMonitor (All versions), SIMATIC WinCC Runtime Advanced (All versions), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.4.8). The web server of the affected devices do not properly handle certain errors when using the Expect HTTP request header, resulting in NULL dereference. This could allow a remote attacker with no privileges to cause a denial of service condition in the system.

remediations

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

A vendor fix is available.

FixedSIMATIC CP 1242-7 V2 (incl. SIPLUS variants)siemens_psirt
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-1 (incl. SIPLUS variants)siemens_psirt
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)siemens_psirt
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-1 IEC (incl. SIPLUS variants)siemens_psirt
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-7 LTEsiemens_psirt
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0)siemens_psirt
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0)siemens_psirt
Update to V2.4.8 or later version
https://support.industry.siemens.com/cs/ww/en/view/109954889/
FixedTIM 1531 IRC (6GK7543-1MX00-0XE0)siemens_psirt
Update to V2.4.8 or later version
https://support.industry.siemens.com/cs/ww/en/view/109954889/
FixedSIMATIC CP 1242-7 V2 (incl. SIPLUS variants)cisa_csaf_ot
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-1 (incl. SIPLUS variants)cisa_csaf_ot
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)cisa_csaf_ot
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-1 IEC (incl. SIPLUS variants)cisa_csaf_ot
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-7 LTEcisa_csaf_ot
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0)cisa_csaf_ot
Update to V3.5.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109972735/
FixedSIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0)cisa_csaf_ot
Update to V2.4.8 or later version
https://support.industry.siemens.com/cs/ww/en/view/109954889/
FixedTIM 1531 IRC (6GK7543-1MX00-0XE0)cisa_csaf_ot
Update to V2.4.8 or later version
https://support.industry.siemens.com/cs/ww/en/view/109954889/
WorkaroundSIMATIC CP 1242-7 V2 (incl. SIPLUS variants)siemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-1 (incl. SIPLUS variants)siemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)siemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-1 IEC (incl. SIPLUS variants)siemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-7 LTEsiemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0)siemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC HMI Comfort Panels (incl. SIPLUS variants)siemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC IPC DiagBasesiemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC IPC DiagMonitorsiemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC WinCC Runtime Advancedsiemens_psirt
Disable the web server of the affected system
WorkaroundSIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0)siemens_psirt
Disable the web server of the affected system
WorkaroundTIM 1531 IRC (6GK7543-1MX00-0XE0)siemens_psirt
Disable the web server of the affected system
WorkaroundSIMATIC CP 1242-7 V2 (incl. SIPLUS variants)cisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-1 (incl. SIPLUS variants)cisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)cisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-1 IEC (incl. SIPLUS variants)cisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-7 LTEcisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0)cisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC HMI Comfort Panels (incl. SIPLUS variants)cisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC IPC DiagBasecisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC IPC DiagMonitorcisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIMATIC WinCC Runtime Advancedcisa_csaf_ot
Disable the web server of the affected system
WorkaroundSIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0)cisa_csaf_ot
Disable the web server of the affected system
WorkaroundTIM 1531 IRC (6GK7543-1MX00-0XE0)cisa_csaf_ot
Disable the web server of the affected system
No fix plannedSIMATIC HMI Comfort Panels (incl. SIPLUS variants)siemens_psirt
Currently no fix is planned
No fix plannedSIMATIC IPC DiagBasesiemens_psirt
Currently no fix is planned
No fix plannedSIMATIC IPC DiagMonitorsiemens_psirt
Currently no fix is planned
No fix plannedSIMATIC WinCC Runtime Advancedsiemens_psirt
Currently no fix is planned
No fix plannedSIMATIC HMI Comfort Panels (incl. SIPLUS variants)cisa_csaf_ot
Currently no fix is planned
No fix plannedSIMATIC IPC DiagBasecisa_csaf_ot
Currently no fix is planned
No fix plannedSIMATIC IPC DiagMonitorcisa_csaf_ot
Currently no fix is planned
No fix plannedSIMATIC WinCC Runtime Advancedcisa_csaf_ot
Currently no fix is planned

cvss

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

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–8.2

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · NCSC-NL NL

v3.15.9mediumAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · productcert@siemens.com DEexploitability 2.2 · impact 3.6

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US

v4.08.2highCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.2highCVSS:4.0/AV:N/AC:H/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

v4.04.6mediumCVSS:4.0/AV:N/AC:H/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)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USCWE-476USCWE-476USCWE-476USCWE-476US

affected products (85)

Products and version ranges known to be affected.

Siemens SIMATIC WinCC Runtime Advancedall versionscert_bundDEcpe:/a:siemens:simatic_wincc:runtime_advanced
SIMATIC CP 1242-7 V2 (incl. SIPLUS variants)all versionscisa_csaf_otUS
SIMATIC CP 1243-1 (incl. SIPLUS variants)all versionscisa_csaf_otUS
SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)all versionscisa_csaf_otUS
SIMATIC CP 1243-1 IEC (incl. SIPLUS variants)all versionscisa_csaf_otUS
SIMATIC CP 1243-7 LTEall versionscisa_csaf_otUS
SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0)all versionscisa_csaf_otUS
SIMATIC HMI Comfort Panels (incl. SIPLUS variants)all versionscisa_csaf_otUS
SIMATIC IPC DiagBaseall versionscisa_csaf_otUS
SIMATIC IPC DiagMonitorall versionscisa_csaf_otUS
SIMATIC WinCC Runtime Advancedall versionscisa_csaf_otUS
SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0)all versionscisa_csaf_otUS
TIM 1531 IRC (6GK7543-1MX00-0XE0)all versionscisa_csaf_otUS
Siemens SIMATIC CP 1242-7 V2 (incl. SIPLUS variants)< V3.5.20cisa_csaf_otUS
Siemens SIMATIC CP 1243-1 (incl. SIPLUS variants)< V3.5.20cisa_csaf_otUS
Siemens SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)< V3.5.20cisa_csaf_otUS
Siemens SIMATIC CP 1243-1 IEC (incl. SIPLUS variants)< V3.5.20cisa_csaf_otUS
Siemens SIMATIC CP 1243-7 LTE< V3.5.20cisa_csaf_otUS
Siemens SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0)< V3.5.20cisa_csaf_otUS
Siemens SIMATIC HMI Comfort Panels (incl. SIPLUS variants)≤ vers:all/*cisa_csaf_otUS

showing 20 of 85

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2024-0362Kwetsbaarheden verholpen in Siemens productenNL2024-09-10csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als Mendix, SICAM, SIMATIC, SINEMA, SINUMERIK en Tecnomatix.
SSA-423808SSA-423808: Multiple NULL Pointer Dereference Vulnerabilities in Industrial Products2024-09-10csaf · siemens_psirtDE
Multiple NULL pointer dereference vulnerabilities in the affected products could allow an attacker with network access to the webserver, to perform a denial of service attack. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.
WID-SEC-W-2024-2091Siemens SIMATIC WinCC: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2024-09-09csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Siemens SIMATIC WinCC ausnutzen, um einen Denial of Service Angriff durchzuführen.
ICSA-24-256-09Siemens SIMATIC, SIPLUS, and TIM2024-09-10icsa · cisa_csaf_otUS
Multiple NULL pointer dereference vulnerabilities in the affected products could allow an attacker with network access to the webserver, to perform a denial of service attack. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisa_csaf_ot ncsc_nl siemens_psirt NVD CVE.org MITRE

published 2024-09-10modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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