by Kastro
Paper/Archive/CVE-2026-62647

CVE-2026-62647

Siemens Reyrolle 7SR5 — A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70).

EPSS 0.6%CVSS 9.3
critical.is priorityof 100
37
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 46.8.468 × 209.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Reyrolle 7SR5< V2.70V2.70CNA

Scores by source

siemens (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
siemens (CNA)7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refcert-portal.siemens.com/productcert/html/ssa-142885.html