Description
A vulnerability has been identified in SIPROTEC 5 6MD84 (CP300) (All versions < V11.0), SIPROTEC 5 6MD85 (CP200) (All versions), SIPROTEC 5 6MD85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 6MD86 (CP200) (All versions), SIPROTEC 5 6MD86 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 6MD89 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 6MU85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7KE85 (CP200) (All versions), SIPROTEC 5 7KE85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SA82 (CP100) (All versions >= V7.80), SIPROTEC 5 7SA82 (CP150) (All versions < V11.0), SIPROTEC 5 7SA84 (CP200) (All versions), SIPROTEC 5 7SA86 (CP200) (All versions), SIPROTEC 5 7SA86 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SA87 (CP200) (All versions), SIPROTEC 5 7SA87 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SD82 (CP100) (All versions >= V7.80), SIPROTEC 5 7SD82 (CP150) (All versions < V11.0), SIPROTEC 5 7SD84 (CP200) (All versions), SIPROTEC 5 7SD86 (CP200) (All versions), SIPROTEC 5 7SD86 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SD87 (CP200) (All versions), SIPROTEC 5 7SD87 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SJ81 (CP100) (All versions >= V7.80), SIPROTEC 5 7SJ81 (CP150) (All versions < V11.0), SIPROTEC 5 7SJ82 (CP100) (All versions >= V7.80), SIPROTEC 5 7SJ82 (CP150) (All versions < V11.0), SIPROTEC 5 7SJ85 (CP200) (All versions), SIPROTEC 5 7SJ85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SJ86 (CP200) (All versions), SIPROTEC 5 7SJ86 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SK82 (CP100) (All versions >= V7.80), SIPROTEC 5 7SK82 (CP150) (All versions < V11.0), SIPROTEC 5 7SK85 (CP200) (All versions), SIPROTEC 5 7SK85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SL82 (CP100) (All versions >= V7.80), SIPROTEC 5 7SL82 (CP150) (All versions < V11.0), SIPROTEC 5 7SL86 (CP200) (All versions), SIPROTEC 5 7SL86 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SL87 (CP200) (All versions), SIPROTEC 5 7SL87 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7SS85 (CP200) (All versions), SIPROTEC 5 7SS85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7ST85 (CP200) (All versions), SIPROTEC 5 7ST85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7ST86 (CP300) (All versions < V11.0), SIPROTEC 5 7SX82 (CP150) (All versions < V11.0), SIPROTEC 5 7SX85 (CP300) (All versions < V11.0), SIPROTEC 5 7SY82 (CP150) (All versions < V11.0), SIPROTEC 5 7UM85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7UT82 (CP100) (All versions >= V7.80), SIPROTEC 5 7UT82 (CP150) (All versions < V11.0), SIPROTEC 5 7UT85 (CP200) (All versions), SIPROTEC 5 7UT85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7UT86 (CP200) (All versions), SIPROTEC 5 7UT86 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7UT87 (CP200) (All versions), SIPROTEC 5 7UT87 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7VE85 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7VK87 (CP200) (All versions), SIPROTEC 5 7VK87 (CP300) (All versions >= V7.80 < V11.0), SIPROTEC 5 7VU85 (CP300) (All versions < V11.0), SIPROTEC 5 Compact 7SX800 (CP050) (All versions < V11.0). Affected devices do not use sufficiently random values to create session identifiers. This could allow an unauthenticated remote attacker to brute force a session identifier and gain read access to limited information from the web server without authorization.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | SIPROTEC 5 6MD84 (CP300) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 6MD85 (CP200) | — | — |
| Siemens | SIPROTEC 5 6MD85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 6MD86 (CP200) | — | — |
| Siemens | SIPROTEC 5 6MD86 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 6MD89 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 6MU85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7KE85 (CP200) | — | — |
| Siemens | SIPROTEC 5 7KE85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SA82 (CP100) | V7.80 | — |
| Siemens | SIPROTEC 5 7SA82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SA84 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SA86 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SA86 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SA87 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SA87 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SD82 (CP100) | V7.80 | — |
| Siemens | SIPROTEC 5 7SD82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SD84 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SD86 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SD86 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SD87 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SD87 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SJ81 (CP100) | V7.80 | — |
| Siemens | SIPROTEC 5 7SJ81 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SJ82 (CP100) | V7.80 | — |
| Siemens | SIPROTEC 5 7SJ82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SJ85 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SJ85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SJ86 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SJ86 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SK82 (CP100) | V7.80 | — |
| Siemens | SIPROTEC 5 7SK82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SK85 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SK85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SL82 (CP100) | V7.80 | — |
| Siemens | SIPROTEC 5 7SL82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SL86 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SL86 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SL87 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SL87 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SS85 (CP200) | — | — |
| Siemens | SIPROTEC 5 7SS85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7ST85 (CP200) | — | — |
| Siemens | SIPROTEC 5 7ST85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7ST86 (CP300) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SX82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SX85 (CP300) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7SY82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7UM85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7UT82 (CP100) | V7.80 | — |
| Siemens | SIPROTEC 5 7UT82 (CP150) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7UT85 (CP200) | — | — |
| Siemens | SIPROTEC 5 7UT85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7UT86 (CP200) | — | — |
| Siemens | SIPROTEC 5 7UT86 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7UT87 (CP200) | — | — |
| Siemens | SIPROTEC 5 7UT87 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7VE85 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7VK87 (CP200) | — | — |
| Siemens | SIPROTEC 5 7VK87 (CP300) | V7.80 – < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 7VU85 (CP300) | < V11.0 | V11.0 |
| Siemens | SIPROTEC 5 Compact 7SX800 (CP050) | < V11.0 | V11.0 |
Advisories 4
- ICSA-26-134-13 Siemens SIPROTEC 5 CISA ICS & IT advisories · May 14, 2026
- NCSC-2026-0147 Kwetsbaarheden verholpen in Siemens-producten NCSC-NL (Netherlands) · May 13, 2026
- SSA-786884 SSA-786884: Insufficient Randomness in Session Identifier Vulnerability in SIPROTEC 5 Siemens ProductCERT · May 12, 2026
- WID-SEC-2026-1473 Siemens SIPROTEC 5-Geräten: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · May 11, 2026