CVE-2026-62654

Physical code execution via unsigned maintenance download

Published Sep 8, 2026 · Updated Sep 8, 2026

Code download without integrity checks in Siemens AG Reyrolle 7SR5 before 2.70 allows physically proximate attackers to execute unsigned code. The boot-time maintenance mode, activated by a physical key sequence, downloads program code from a network server and executes it without checking authenticity or integrity. Physical access during device startup is required, after which arbitrary code can take control of relay operations.

CVSS severity6.8
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code download without integrity checks in Siemens AG Reyrolle 7SR5 before 2.70 allows physically proximate attackers to execute unsigned code. The boot-time maintenance mode, activated by a physical key sequence, downloads program code from a network server and executes it without checking authenticity or integrity. Physical access during device startup is required, after which arbitrary code can take control of relay operations.

The record

CVE
CVE-2026-62654
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Siemens AG
Product
Reyrolle 7SR5
Classifications
CWE-494, T0843
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V2.70

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Siemens AG · Reyrolle 7SR5version=0 <V2.70

Published CVSS scores

7.0Siemens ProductCERTCVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
6.8Siemens ProductCERTCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-494Download of Code Without Integrity Check
T0843Program Download

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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