What is CVE-2026-62653?

CVE-2026-62653 is a medium-severity vulnerability in Siemens Reyrolle 7sr5, classified under Out-of-bounds Write. CVSS score: 6.8/10. Published 2026-09-08.

How severe is CVE-2026-62653?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Buffer overflow in Siemens Reyrolle 7sr5

CVE-2026-62653

A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). The input received over a proprietary communication protocol that is exposed when the device is placed into a special firmware-update mode is not properly validated, resulting in a memory corruption condition. This could allow an unauthenticated attacker with physical access to the device to cause a crash and potentially execute arbitrary code on the device.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Siemens Reyrolle 7sr5

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

productcert@siemens.com

Frequently asked questions

What is CVE-2026-62653?: CVE-2026-62653 is a medium-severity vulnerability in Siemens Reyrolle 7sr5, classified under Out-of-bounds Write. CVSS score: 6.8/10. Published 2026-09-08.
How severe is CVE-2026-62653?: Medium severity. CVSS v3 base score is 6.8 out of 10.