CVE-2023-43503

highpriority · track · 30OT risk · elevatedEPSS 0.003 · 24 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.31% (24th) EPSS
CVSS 7.5 · high
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 < V10.4.4). Caching system in the affected application leaks sensitive information such as user and project information in cleartext via UDP.

01

remediations

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

A vendor fix is available.

  • FixedCOMOSsiemens_psirt

    For CVE-2023-43503, update to V10.4.4 or later version and update the COMOS database to version 25. (See “Data maintenance: Modifying the version” in the user manual. Warning: After the update, the database cannot be used by older COMOS versions)

  • FixedCOMOScisa_csaf_ot

    For CVE-2023-43503, update to V10.4.4 or later version and update the COMOS database to version 25. (See “Data maintenance: Modifying the version” in the user manual. Warning: After the update, the database cannot be used by older COMOS versions)

  • MitigationCOMOSsiemens_psirt

    Ensure all files imported into COMOS originate from a trusted source and transmitted are over secure channels

  • MitigationCOMOScisa_csaf_ot

    Ensure all files imported into COMOS originate from a trusted source and transmitted are over secure channels

02

cvss

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

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.5–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.13.5lowCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:Csecondary · CISA US
v3.13.5lowAV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.13.5lowCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:Csecondary · ENISA EU
v3.13.5lowCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · productcert@siemens.com DEexploitability 2.1 · impact 1.4
v3.13.5lowCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/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.

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-319USprimaryCWE-319USCWE-319USCWE-319US
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
10

references (4)

External citations — patches, advisories, analysis.

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