High severity · published Sep 8, 2026
CVE-2026-62647
A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70)
7.4
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
R7
Reyrolle 7SR5 · Siemens
before V2.70 · source: vendor
In the news
VulnerabilityCritical
Siemens Reyrolle 7SR5
View CSAF Summary Siemens Reyrolle 7SR5 Before V2.70 is affected by multiple vulnerabilities. Siemens has released a new version for Reyrolle 7SR5 and recommends to update to the latest version. The following versions of Siemens Reyrolle 7SR5 are affected: Reyrolle 7SR5 vers:intdot/&lt;2.70 (CVE-2024-42384, CVE-2024-42385, CVE-2024-42386, CVE-2024-42391, CVE-2024-42392, CVE-2026-62645, CVE-2026-62646, CVE-2026-62647, CVE-2026-62648, CVE-2026-62649, CVE-2026-62650, CVE-2026-62652, CVE-2026-62653, CVE-2026-62654) CVSS Vendor Equipment Vulnerabilities v3 9.8 Siemens Siemens Reyrolle 7SR5 Integer Overflow or Wraparound, Improper Neutralization of Delimiters, Use of Out-of-range Pointer Offset, Missing Authentication for Critical Function, Insufficient Entropy, Improper Input Validation, Out-of-bounds Write, Allocation of Resources Without Limits or Throttling, Authentication Bypass Using an Alternate Path or Channel, Insertion of Sensitive Information Into Debugging Code, Download of Code Without Integrity Check Background Critical Infrastructure Sectors: Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2024-42384 Integer Overflow or Wraparound vulnerability in Cesanta Mongoose Web Server v7.14 allows an attacker to send an unexpected TLS packet and produce a segmentation fault on the application. View CVE Details ...
Sep 15, 2026·CISA Advisories
Affected product
R7
Reyrolle 7SR5
Siemens
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