# CVE-2025-40742: Siemens SIPROTEC 5 sensitive data exposure in URL requests Source: https://junglewise.ai/threats/cve-2025-40742-siemens-siprotec-5-sensitive-data-exposure-in-url-requests Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Published: 2025-07-08. Updated: 2026-05-12 License: CC BY 4.0 with a link back CVE-2025-40742 · Severity: medium · CVSS 5.3 · Published 2025-07-08 Siemens SIPROTEC 5 devices, which are used for protection and control in power systems, are affected by a vulnerability that exposes sensitive session information. An attacker could potentially gain unauthorized access to the device's management interface by retrieving session identifiers from browser history or system logs. This could allow an unauthorized user to view device configurations or operational data. Technologies: [Siemens SIPROTEC 5 6MD84 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-6md84-cp300), [Siemens SIPROTEC 5 6MD85 (CP200)](https://junglewise.ai/threats/technologies/siprotec-5-6md85-cp200), [Siemens SIPROTEC 5 6MD85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-6md85-cp300), [Siemens SIPROTEC 5 6MD86 (CP200)](https://junglewise.ai/threats/technologies/siprotec-5-6md86-cp200), [Siemens SIPROTEC 5 6MD86 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-6md86-cp300), [Siemens SIPROTEC 5 6MD89 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-6md89-cp300), [Siemens SIPROTEC 5 6MU85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-6mu85-cp300), [Siemens SIPROTEC 5 7KE85 (CP200)](https://junglewise.ai/threats/technologies/siprotec-5-7ke85-cp200), [Siemens SIPROTEC 5 7KE85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7ke85-cp300), [Siemens SIPROTEC 5 7SA82 (CP100)](https://junglewise.ai/threats/technologies/siprotec-5-7sa82-cp100), [Siemens SIPROTEC 5 7SA82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sa82-cp150), [Siemens SIPROTEC 5 7SA86 (CP200)](https://junglewise.ai/threats/technologies/siprotec-5-7sa86-cp200), [Siemens SIPROTEC 5 7SA86 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sa86-cp300), [Siemens SIPROTEC 5 7SA87 (CP200)](https://junglewise.ai/threats/technologies/siprotec-5-7sa87-cp200), [Siemens SIPROTEC 5 7SA87 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sa87-cp300), [Siemens SIPROTEC 5 7SD82 (CP100)](https://junglewise.ai/threats/technologies/siprotec-5-7sd82-cp100), [Siemens SIPROTEC 5 7SD82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sd82-cp150), [Siemens SIPROTEC 5 7SD86 (CP200)](https://junglewise.ai/threats/technologies/siprotec-5-7sd86-cp200), [Siemens SIPROTEC 5 7SD86 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sd86-cp300), [Siemens SIPROTEC 5 7SD87 (CP200)](https://junglewise.ai/threats/technologies/siprotec-5-7sd87-cp200), [Siemens SIPROTEC 5 7SD87 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sd87-cp300), [Siemens SIPROTEC 5 7SJ81 (CP100)](https://junglewise.ai/threats/technologies/siprotec-5-7sj81-cp100), [Siemens SIPROTEC 5 7SJ81 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sj81-cp150), [Siemens SIPROTEC 5 7SJ82 (CP100)](https://junglewise.ai/threats/technologies/siprotec-5-7sj82-cp100), [Siemens SIPROTEC 5 7SJ82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sj82-cp150), [Siemens SIPROTEC 5 7SJ85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sj85-cp300), [Siemens SIPROTEC 5 7SJ86 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sj86-cp300), [Siemens SIPROTEC 5 7SK82 (CP100)](https://junglewise.ai/threats/technologies/siprotec-5-7sk82-cp100), [Siemens SIPROTEC 5 7SK82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sk82-cp150), [Siemens SIPROTEC 5 7SK85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sk85-cp300), [Siemens SIPROTEC 5 7SL82 (CP100)](https://junglewise.ai/threats/technologies/siprotec-5-7sl82-cp100), [Siemens SIPROTEC 5 7SL82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sl82-cp150), [Siemens SIPROTEC 5 7SL86 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sl86-cp300), [Siemens SIPROTEC 5 7SL87 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sl87-cp300), [Siemens SIPROTEC 5 7SS85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7ss85-cp300), [Siemens SIPROTEC 5 7ST85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7st85-cp300), [Siemens SIPROTEC 5 7ST86 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7st86-cp300), [Siemens SIPROTEC 5 7SX82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sx82-cp150), [Siemens SIPROTEC 5 7SX85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7sx85-cp300), [Siemens SIPROTEC 5 7SY82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7sy82-cp150), [Siemens SIPROTEC 5 7UM85 (CP300)](https://junglewise.ai/threats/technologies/siprotec-5-7um85-cp300), [Siemens SIPROTEC 5 7UT82 (CP100)](https://junglewise.ai/threats/technologies/siprotec-5-7ut82-cp100), [Siemens SIPROTEC 5 7UT82 (CP150)](https://junglewise.ai/threats/technologies/siprotec-5-7ut82-cp150). Vendors: [Siemens](https://junglewise.ai/threats/vendors/siemens). ## Quick answers **Is CVE-2025-40742 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-40742 being exploited in the wild. **How severe is CVE-2025-40742?** Medium severity, with a CVSS score of 5.3, published 8 July 2025. **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) < V11.0; Siemens SIPROTEC 5 6MD86 (CP200) All versions; and 47 more. **Is there a fix for CVE-2025-40742?** 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-2025-40742 attacked?** It is attacked over the network, in a network appliance. **Am I affected by CVE-2025-40742?** 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 (CWE-598) exists in the web-based management interface of various Siemens SIPROTEC 5 protection devices. The application transmits sensitive session identifiers within the URL query string of GET requests. An attacker who gains access to browser history, web server logs, or proxy logs could extract these identifiers to hijack active sessions. Exploitation requires network access to the device and typically involves some form of user interaction or secondary access to log storage. Siemens has released firmware version V11.0 to address this for many affected models, while others currently have no fix available. ## Affected products - Siemens SIPROTEC 5 6MD84 (CP300) < V11.0 - Siemens SIPROTEC 5 6MD85 (CP200) All versions - Siemens SIPROTEC 5 6MD85 (CP300) < V11.0 - Siemens SIPROTEC 5 6MD86 (CP200) All versions - Siemens SIPROTEC 5 6MD86 (CP300) < V11.0 - Siemens SIPROTEC 5 6MD89 (CP300) < V11.0 - Siemens SIPROTEC 5 6MU85 (CP300) < V11.0 - Siemens SIPROTEC 5 7KE85 (CP200) All versions - Siemens SIPROTEC 5 7KE85 (CP300) < V11.0 - Siemens SIPROTEC 5 7SA82 (CP100) All versions - Siemens SIPROTEC 5 7SA82 (CP150) < V11.0 - Siemens SIPROTEC 5 7SA84 (CP200) All versions - Siemens SIPROTEC 5 7SA86 (CP200) All versions - Siemens SIPROTEC 5 7SA86 (CP300) < V11.0 - Siemens SIPROTEC 5 7SA87 (CP200) All versions - Siemens SIPROTEC 5 7SA87 (CP300) < V11.0 - Siemens SIPROTEC 5 7SD82 (CP100) All versions - Siemens SIPROTEC 5 7SD82 (CP150) < V11.0 - Siemens SIPROTEC 5 7SD84 (CP200) All versions - Siemens SIPROTEC 5 7SD86 (CP200) All versions - Siemens SIPROTEC 5 7SD86 (CP300) < V11.0 - Siemens SIPROTEC 5 7SD87 (CP200) All versions - Siemens SIPROTEC 5 7SD87 (CP300) < V11.0 - Siemens SIPROTEC 5 7SJ81 (CP100) All versions - Siemens SIPROTEC 5 7SJ81 (CP150) < V11.0 - Siemens SIPROTEC 5 7SJ82 (CP100) All versions - Siemens SIPROTEC 5 7SJ82 (CP150) < V11.0 - Siemens SIPROTEC 5 7SJ85 (CP200) All versions - Siemens SIPROTEC 5 7SJ85 (CP300) < V11.0 - Siemens SIPROTEC 5 7SJ86 (CP200) All versions - Siemens SIPROTEC 5 7SJ86 (CP300) < V11.0 - Siemens SIPROTEC 5 7SK82 (CP100) All versions - Siemens SIPROTEC 5 7SK82 (CP150) < V11.0 - Siemens SIPROTEC 5 7SK85 (CP200) All versions - Siemens SIPROTEC 5 7SK85 (CP300) < V11.0 - Siemens SIPROTEC 5 7SL82 (CP100) All versions - Siemens SIPROTEC 5 7SL82 (CP150) < V11.0 - Siemens SIPROTEC 5 7SL86 (CP200) All versions - Siemens SIPROTEC 5 7SL86 (CP300) < V11.0 - Siemens SIPROTEC 5 7SL87 (CP200) All versions - Siemens SIPROTEC 5 7SL87 (CP300) < V11.0 - Siemens SIPROTEC 5 7SS85 (CP200) All versions - Siemens SIPROTEC 5 7SS85 (CP300) < V11.0 - Siemens SIPROTEC 5 7ST85 (CP200) All versions - Siemens SIPROTEC 5 7ST85 (CP300) < V11.0 - Siemens SIPROTEC 5 7ST86 (CP300) < V11.0 - Siemens SIPROTEC 5 7SX82 (CP150) < V11.0 - Siemens SIPROTEC 5 7SX85 (CP300) < V11.0 - Siemens SIPROTEC 5 7SY82 (CP150) < V11.0 - Siemens SIPROTEC 5 7UM85 (CP300) < V11.0 - Siemens SIPROTEC 5 7UT82 (CP100) All versions - Siemens,versions: SIPROTEC 5 7UT82 (CP150) - Siemens,versions: SIPROTEC 5 7UT85 (CP200) - Siemens,versions: SIPROTEC 5 7UT85 (CP300) - Siemens,versions: SIPROTEC 5 7UT86 (CP200) - Siemens,versions: SIPROTEC 5 7UT86 (CP300) - Siemens,versions: SIPROTEC 5 7UT87 (CP200) - Siemens,versions: SIPROTEC 5 7UT87 (CP300) - Siemens,versions: SIPROTEC 5 7VE85 (CP300) - Siemens,versions: SIPROTEC 5 7VK87 (CP200) - Siemens,versions: SIPROTEC 5 7VK87 (CP300) - Siemens,versions: SIPROTEC 5 7VU85 (CP300) - Siemens,versions: SIPROTEC 5 Compact 7SX800 (CP050) ## Timeline - 2025-07-08: disclosed - 2025-07-08: advisory - 2026-05-12: other: Last update to advisory ## References - [https://cert-portal.siemens.com/productcert/html/ssa-904646.html](https://cert-portal.siemens.com/productcert/html/ssa-904646.html) ## Related threats - [Siemens SIPROTEC 5 insufficient randomness in session identifiers](https://junglewise.ai/threats/cve-2024-54017-siemens-siprotec-5-insufficient-randomness-in-session-identifiers)