Description
A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). A random number generator is used to generate security-relevant values (such as session identifiers used for authentication purposes) that is not initialized with a True Random Number Generator (TRNG), resulting in a predictable sequence of generated values. This could allow an unauthenticated remote attacker to more easily predict the generated values and impersonate a legitimate authenticated user, potentially gaining unauthorized access to the device.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | Reyrolle 7SR5 | < V2.70 | V2.70 |
Advisories 3
- ICSA-26-258-05 Siemens Reyrolle 7SR5 CISA ICS & IT advisories · Sep 15, 2026
- NCSC-2026-0346 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Sep 8, 2026
- SSA-142885 SSA-142885: Multiple Vulnerabilities in Reyrolle 7SR5 Before V2.70 Siemens ProductCERT · Sep 8, 2026