NVD

CVE-2023-36521 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3.4), SIMATIC MV540 S (All versions < V3.3.4), SIMATIC MV550 H (All versions < V3.3.4), SIMATIC MV550 S (All versions < V3.3.4), SIMATIC MV560 U (All versions < V3.3.4), SIMATIC MV560 X (All versions < V3.3.4). The result synchronization server of the affected products contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of service situation of all socket-based communication of the affected products if the result server is enabled.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 7.5 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Nist CVSS score does not match with CNA score

CNA: Siemens AG

Base Score: 8.6 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://cert-portal.siemens.com/productcert/pdf/ssa-561322.pdf	CVE, Siemens AG	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	NIST Siemens AG

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Change History

5 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 2:06:27 AM

Action

Type

Old Value

New Value

Added

Affected

[{"vendor":"siemens","product":"simatic_mv540_h","defaultStatus":"unknown","cpes":["cpe:2.3:h:siemens:simatic_mv540_h:-:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"V3.3.4","versionType":"custom","status":"affected"}]},{"vendor":"siemens","product":"simatic_mv540_s","defaultStatus":"unknown","cpes":["cpe:2.3:h:siemens:simatic_mv540_s:-:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"V3.3.4","versionType":"custom","status":"affected"}]},{"vendor":"siemens","product":"simatic_mv550_h","defaultStatus":"unknown","cpes":["cpe:2.3:h:siemens:simatic_mv550_h:-:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"V3.3.4","versionType":"custom","status":"affected"}]},{"vendor":"siemens","product":"simatic_mv550_s","defaultStatus":"unknown","cpes":["cpe:2.3:h:siemens:simatic_mv550_s:-:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"V3.3.4","versionType":"custom","status":"affected"}]},{"vendor":"siemens","product":"simatic_mv560_u","defaultStatus":"unknown","cpes":["cpe:2.3:h:siemens:simatic_mv560_u:-:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"V3.3.4","versionType":"custom","status":"affected"}]},{"vendor":"siemens","product":"simatic_mv560_x","defaultStatus":"unknown","cpes":["cpe:2.3:h:siemens:simatic_mv560_x:-:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"V3.3.4","versionType":"custom","status":"affected"}]}]

Added

SSVC

{"timestamp":"2024-11-21T14:06:23.456400Z","id":"CVE-2023-36521","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

Initial Analysis by NIST 7/19/2023 11:21:04 AM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST CWE-770
Added	CPE Configuration		AND OR cpe:2.3:o:siemens:simatic_mv540_h_firmware::::::::* versions up to (excluding) 3.3.4 OR cpe:2.3:h:siemens:simatic_mv540_h:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:siemens:simatic_mv540_s_firmware::::::::* versions up to (excluding) 3.3.4 OR cpe:2.3:h:siemens:simatic_mv540_s:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:siemens:simatic_mv550_h_firmware::::::::* versions up to (excluding) 3.3.4 OR cpe:2.3:h:siemens:simatic_mv550_h:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:siemens:simatic_mv550_s_firmware::::::::* versions up to (excluding) 3.3.4 OR cpe:2.3:h:siemens:simatic_mv550_s:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:siemens:simatic_mv560_u_firmware::::::::* versions up to (excluding) 3.3.4 OR cpe:2.3:h:siemens:simatic_mv560_u:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:siemens:simatic_mv560_x_firmware::::::::* versions up to (excluding) 3.3.4 OR cpe:2.3:h:siemens:simatic_mv560_x:-:::::::*
Changed	Reference Type	https://cert-portal.siemens.com/productcert/pdf/ssa-561322.pdf No Types Assigned	https://cert-portal.siemens.com/productcert/pdf/ssa-561322.pdf Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2023-36521
NVD Published Date:
07/11/2023
NVD Last Modified:
06/17/2026
Source:
Siemens AG

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2023-36521 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CISA-ADP 6/17/2026 2:06:27 AM

CVE Modified by Siemens AG 6/17/2026 2:06:27 AM

CVE Modified by CVE 11/21/2024 3:09:52 AM

CVE Modified by Siemens AG 5/14/2024 9:18:36 AM

Initial Analysis by NIST 7/19/2023 11:21:04 AM

Quick Info