CVE-2023-42796

highpriority · track · 35EPSS 0.010 · 62 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.97% (62nd) EPSS

CVSS 8.8 · high

Is it mine?

19 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. By exploring active session IDs, the vulnerability could potentially be leveraged to escalate privileges to the administrator role.

remediations

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

A vendor fix is available.

FixedCP-8031 MASTER MODULE (6MF2803-1AA00)siemens_psirt
Update to CPCI85 V05.11 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804985/
FixedCP-8050 MASTER MODULE (6MF2805-0AA00)siemens_psirt
Update to CPCI85 V05.11 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804985/
FixedCP-8031 MASTER MODULE (6MF2803-1AA00)cisa_csaf_ot
Update to CPCI85 V05.11 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804985/
FixedCP-8050 MASTER MODULE (6MF2805-0AA00)cisa_csaf_ot
Update to CPCI85 V05.11 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804985/
MitigationCP-8031 MASTER MODULE (6MF2803-1AA00)siemens_psirt
Restrict network access to the integrated web server
MitigationCP-8050 MASTER MODULE (6MF2805-0AA00)siemens_psirt
Restrict network access to the integrated web server
MitigationCP-8031 MASTER MODULE (6MF2803-1AA00)cisa_csaf_ot
Restrict network access to the integrated web server
MitigationCP-8050 MASTER MODULE (6MF2805-0AA00)cisa_csaf_ot
Restrict network access to the integrated web server

cvss

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

8.8

010

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

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.17.5highAV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · productcert@siemens.com DEexploitability 1.6 · impact 5.9

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22USCWE-22USCWE-22US

affected products (19)

Products and version ranges known to be affected.

Siemens SICAM A8000all versionscert_bundDEcpe:/h:siemens:sicam:a8000
Siemens SICAM CPall versionscert_bundDEcpe:/h:siemens:sicam:cp
Siemens SICAM HMI Comfort Outdoor Panelsall versionscert_bundDEcpe:/h:siemens:sicam:hmi_comfort_outdoor_panels
Siemens SICAM HMI KTP Mobile Panelsall versionscert_bundDEcpe:/h:siemens:sicam:hmi_ktp_mobile_panels
Siemens SICAM NET PC Softwareall versionscert_bundDEcpe:/h:siemens:sicam:net_pc_software
Siemens SICAM PASall versionscert_bundDEcpe:/h:siemens:sicam:pas
Siemens SICAM PQSall versionscert_bundDEcpe:/h:siemens:sicam:pqs
CP-8031 MASTER MODULE (6MF2803-1AA00)all versionscisa_csaf_otUS
CP-8050 MASTER MODULE (6MF2805-0AA00)all versionscisa_csaf_otUS
Siemens CP-8031 MASTER MODULE (6MF2803-1AA00)< CPCI85_V05.11cisa_csaf_otUS
Siemens CP-8050 MASTER MODULE (6MF2805-0AA00)< CPCI85_V05.11cisa_csaf_otUS
Siemens CP-8031 MASTER MODULEAll versions → CPCI85 V05.11enisa_euvdEU
Siemens CP-8050 MASTER MODULEAll versions → CPCI85 V05.11enisa_euvdEU
Siemens AG CP-8031 MASTER MODULE≤ CPCI85 05.11fstec_bduRU
Siemens AG CP-8050 MASTER MODULE≤ CPCI85 05.11fstec_bduRU
siemens cp-8031 firmware< 05.11nvdUScpe:2.3:o:siemens:cp-8031_firmware:*:*:*:*:*:*:*:*
siemens cp-8050 firmware< 05.11nvdUScpe:2.3:o:siemens:cp-8050_firmware:*:*:*:*:*:*:*:*
Siemens CP-8031 MASTER MODULE (6MF2803-1AA00)≤ All versions < CPCI85 V05.11siemens_psirtDE
Siemens CP-8050 MASTER MODULE (6MF2805-0AA00)≤ All versions < CPCI85 V05.11siemens_psirtDE

advisories (3)

Vendor and ecosystem advisories describing this.

SSA-770890SSA-770890: Path Traversal Vulnerability in the Web Server of CPCI85 Firmware of SICAM A8000 Devices2023-10-10csaf · siemens_psirtDE
The web server in the CPCI85 firmware of SICAM A8000 CP-8031 and CP-8050 is affected by a path traversal vulnerability that could allow an authenticated remote attacker to traverse directories on the system, download arbitrary files and potentially escalate privileges to the administrator role. Siemens has released updates for the affected products and recommends to update to the latest versions.
WID-SEC-W-2023-2603Siemens SICAM: Mehrere SchwachstellenDeutsch2023-10-09csaf · cert_bundDE
Ein entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in Siemens SICAM ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen, seine Privilegien zu erweitern und Daten zu manipulieren.
ICSA-23-285-03Siemens SICAM A8000 Devices2023-10-10icsa · cisa_csaf_otUS
The web server in the CPCI85 firmware of SICAM A8000 CP-8031 and CP-8050 is affected by a path traversal vulnerability that could allow an authenticated remote attacker to traverse directories on the system, download arbitrary files and potentially escalate privileges to the administrator role. Siemens has released updates for the affected products and recommends to update to the latest versions.

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 nvd siemens_psirt NVD CVE.org MITRE

published 2023-10-10modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan