CVE-2024-54017: Siemens SIPROTEC 5 insufficient randomness in session identifiers

CVE-2024-54017 · Severity: high · CVSS 5.3 · Published 2026-05-12

Siemens SIPROTEC 5 devices, which are used for protection and control in electrical power grids, contain a vulnerability in how they manage user sessions. An attacker could potentially guess a valid session ID and gain unauthorized access to the device's web interface. This could allow an attacker to view sensitive operational information, potentially aiding in further attacks against critical infrastructure.

Technologies: Siemens SIPROTEC 5 6MD84 (CP300), Siemens SIPROTEC 5 6MD85 (CP200), Siemens SIPROTEC 5 6MD85 (CP300), Siemens SIPROTEC 5 6MD86 (CP200), Siemens SIPROTEC 5 6MD86 (CP300), Siemens SIPROTEC 5 6MD89 (CP300), Siemens SIPROTEC 5 6MU85 (CP300), Siemens SIPROTEC 5 7KE85 (CP200), Siemens SIPROTEC 5 7KE85 (CP300), Siemens SIPROTEC 5 7SA82 (CP100), Siemens SIPROTEC 5 7SA82 (CP150), Siemens SIPROTEC 5 7SA86 (CP200), Siemens SIPROTEC 5 7SA86 (CP300), Siemens SIPROTEC 5 7SA87 (CP200), Siemens SIPROTEC 5 7SA87 (CP300), Siemens SIPROTEC 5 7SD82 (CP100), Siemens SIPROTEC 5 7SD82 (CP150), Siemens SIPROTEC 5 7SD86 (CP200), Siemens SIPROTEC 5 7SD86 (CP300), Siemens SIPROTEC 5 7SD87 (CP200), Siemens SIPROTEC 5 7SD87 (CP300), Siemens SIPROTEC 5 7SJ81 (CP100), Siemens SIPROTEC 5 7SJ81 (CP150), Siemens SIPROTEC 5 7SJ82 (CP100), Siemens SIPROTEC 5 7SJ82 (CP150). Vendors: Siemens.

Quick answers

Is CVE-2024-54017 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2024-54017 being exploited in the wild.
How severe is CVE-2024-54017?
High severity, with a CVSS score of 5.3, published 12 May 2026.
Which products and versions are affected?
Siemens SIPROTEC 5 6MD84 (CP300) < V11.0; Siemens SIPROTEC 5 6MD85 (CP200) All versions; Siemens SIPROTEC 5 6MD85 (CP300) >= V7.80 < V11.0; Siemens SIPROTEC 5 6MD86 (CP200) All versions; and 22 more.
Is there a fix for CVE-2024-54017?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2024-54017 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2024-54017?
Check whether you run Siemens SIPROTEC 5 6MD84 (CP300), Siemens SIPROTEC 5 6MD85 (CP200), Siemens SIPROTEC 5 6MD85 (CP300) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is classified as a 'Small Space of Random Values' (CWE-334) within the session management component of the SIPROTEC 5 web server. Because session identifiers are generated with insufficient entropy, a remote, unauthenticated attacker can perform a brute-force attack to identify and hijack active sessions. Successful exploitation allows the attacker to gain unauthorized read access to limited information from the web server. Siemens has released firmware version 11.0 to address this issue for many affected models; for others, countermeasures and resilient protection schemes are recommended.

Affected products

  • Siemens SIPROTEC 5 6MD84 (CP300) < 11.0
  • Siemens SIPROTEC 5 6MD85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 6MD86 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 6MD89 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 6MU85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7KE85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SA82 (CP100) >= 7.80
  • Siemens SIPROTEC 5 7SA82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7SA86 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SA87 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SD82 (CP100) >= 7.80
  • Siemens SIPROTEC 5 7SD82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7SD86 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SD87 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SJ81 (CP100) >= 7.80
  • Siemens SIPROTEC 5 7SJ81 (CP150) < 11.0
  • Siemens SIPROTEC 5 7SJ82 (CP100) >= 7.80
  • Siemens SIPROTEC 5 7SJ82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7SJ85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SJ86 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SK82 (CP100) >= 7.80
  • Siemens SIPROTEC 5 7SK82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7SK85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SL82 (CP100) >= 7.80
  • Siemens SIPROTEC 5 7SL82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7SL86 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SL87 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7SS85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7ST85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7ST86 (CP300) < 11.0
  • Siemens SIPROTEC 5 7SX82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7SX85 (CP300) < 11.0
  • Siemens SIPROTEC 5 7SY82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7UM85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7UT82 (CP100) >= 7.80
  • Siemens SIPROTEC 5 7UT82 (CP150) < 11.0
  • Siemens SIPROTEC 5 7UT85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7UT86 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7UT87 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7VE85 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7VK87 (CP300) >= 7.80, < 11.0
  • Siemens SIPROTEC 5 7VU85 (CP300) < 11.0
  • Siemens SIPROTEC 5 Compact 7SX800 (CP050) < 11.0

Timeline

  • 2026-05-14: advisory: CISA Advisory ICSA-26-134-13 published
  • 2026-05-14: disclosed: Vulnerability disclosed by Siemens and CISA

References

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