CVE•Published 2023-07-11•Modified 2026-10-23•1 article on news•5 live references•NVD data

CVE-2023-36521Siemens · Simatic_mv540_h_firmware

Vulnerability data via NVD (ingested)

CVSS v3.1

8.6

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 51% of all CVEs

Weaknesses (CWE)

CWE-770Allocation of Resources Without Limits or Throttling

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.

Timeline

Published 2023-07-11

Modified 2026-10-23

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2023-36521

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · OS

os:"Simatic Mv540 H Firmware"

Hosts Shodan identified as running Simatic Mv540 H Firmware.

More intel sources (5)

Shodan report

vuln:CVE-2023-36521

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2023-36521