CVE-2023-43505

mediumpriority · track · 26EPSS 0.006 · 49 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.62% (49th) EPSS
CVSS 6.5 · medium
Is it mine?
6 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

A vulnerability has been identified in COMOS (All versions). The affected application lacks proper access controls in SMB shares. This could allow an attacker to access files that the user should not have access to.

01

remediations

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

No vendor fix yet; a mitigation is available.

  • MitigationCOMOSsiemens_psirt

    CVE-2023-43505, CVE-2023-46601: Use an application server like Citrix which builds an additional layer of access control around COMOS. The file share with the documents folder and the database should be only accessible by the application server. You can find further recommendations in the COMOS manual “Securityrelevant configuration” in COMOS documentation ( https://support.industry.siemens.com/cs/document/109823629/)

  • MitigationCOMOScisa_csaf_ot

    CVE-2023-43505, CVE-2023-46601: Use an application server like Citrix which builds an additional layer of access control around COMOS. The file share with the documents folder and the database should be only accessible by the application server. You can find further recommendations in the COMOS manual “Securityrelevant configuration” in COMOS documentation ( https://support.industry.siemens.com/cs/document/109823629/)

  • No fix plannedCOMOSsiemens_psirt

    Currently no fix is planned

  • No fix plannedCOMOScisa_csaf_ot

    Currently no fix is planned

02

cvss

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

9.6
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6–9.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6
v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:Csecondary · CISA US
v3.19.6criticalAV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU
v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:Csecondary · ENISA EU
v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Nsecondary · productcert@siemens.com DEexploitability 3.1 · impact 5.8
v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
03

ssvc

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

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USCWE-284USCWE-284USCWE-284US
05

affected products (6)

Products and version ranges known to be affected.

06

advisories (2)

Vendor and ecosystem advisories describing this.

  • SSA-137900SSA-137900: Multiple Vulnerabilities in COMOS2023-11-14csaf · siemens_psirtDE

    COMOS is affected by multiple vulnerabilities that could allow an attacker to execute arbitrary code or cause denial of service condition, data infiltration or perform access control violations. Siemens has released an update for COMOS and recommends to update to the latest version. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

  • ICSA-23-320-09Siemens COMOS2023-11-14icsa · cisa_csaf_otUS

    COMOS is affected by multiple vulnerabilities that could allow an attacker to execute arbitrary code or cause denial of service condition, data infiltration or perform access control violations. Siemens has released an update for COMOS and recommends to update to the latest version. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otnvdsiemens_psirtNVDCVE.orgMITRE
published 2023-11-14modified 2026-06-17
09

references (4)

External citations — patches, advisories, analysis.

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