---
id: CVE-2026-62646
title: A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70)
summary: >-
  A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). A
  session identifier is generated using an algorithm with insufficient
  randomness, resulting in a token with low entropy that can be predicted or
  brute-forced w…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-331
vendor: Siemens
product: Reyrolle 7SR5
affected:
  - reyrolle_7sr5 < V2.70
published: '2026-09-08'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T19:17:31.797'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62646'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-142885.html'
    label: productcert@siemens.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-10T18:19:17.570941Z'
epss: 0.00509
epssPercentile: 0.40881
ingestedAt: '2026-09-08T15:33:26.982Z'
---

## Overview

A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). A session identifier is generated using an algorithm with insufficient randomness, resulting in a token with low entropy that can be predicted or brute-forced within a feasible number of attempts. This could allow an unauthenticated remote attacker to derive valid session identifiers and bypass authentication.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.