Vulnerability Monitor

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CVE-2021-40364


A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions < V15 SP1 Update 7), SIMATIC WinCC V16 (All versions < V16 Update 5), SIMATIC WinCC V17 (All versions < V17 Update 2), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 5). The affected systems store sensitive information in log files. An attacker with access to the log files could publicly expose the information or reuse it to develop further attacks on the system.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 2 products from siemens, from siemens organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-11-09T12:15:10.070

Last Modified

2024-11-21T06:23:57.400

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:N/A:N

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

3.9

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-532
  • Type: Secondary
    CWE-532

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application siemens simatic_pcs_7 ≤ 8.2 Yes
Application siemens simatic_pcs_7 < 9.1 Yes
Application siemens simatic_pcs_7 9.1 Yes
Application siemens simatic_wincc ≤ 7.4 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 7.5 Yes
Application siemens simatic_wincc 15 Yes
Application siemens simatic_wincc 16 Yes
Application siemens simatic_wincc 16 Yes
Application siemens simatic_wincc 16 Yes
Application siemens simatic_wincc 16 Yes
Application siemens simatic_wincc 16 Yes
Application siemens simatic_wincc 17 Yes
Application siemens simatic_wincc 17 Yes

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For siemens's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.