CVE-2026-62647: Siemens Reyrolle 7sr5

High severity, CVSS 7.4. EPSS: 0.6% chance of exploitation in the next 30 days.

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

• Siemens Reyrolle 7sr5: before V2.70 (fixed in V2.70)

Published 2026-09-08. Last modified 2026-09-14.