CVE-2026-62645Network attack vector

Authentication bypass via exposed session identifiers

Published Sep 8, 2026 · Updated Sep 8, 2026

Authentication bypass in Siemens Reyrolle 7SR5 before 2.70 allows remote attackers to gain unauthorized device access via its web interface. The web interface exposes information from which current and past session ID numbers can be calculated. Network access to the HTTPS WebUI is sufficient, and a calculated identifier grants access to functions intended for authenticated users.

CVSS severity9.3
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Siemens Reyrolle 7SR5 before 2.70 allows remote attackers to gain unauthorized device access via its web interface. The web interface exposes information from which current and past session ID numbers can be calculated. Network access to the HTTPS WebUI is sufficient, and a calculated identifier grants access to functions intended for authenticated users.

The record

CVE
CVE-2026-62645
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Siemens AG
Product
Reyrolle 7SR5
Classifications
CWE-306, T1190
Attack vector
network
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 vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

9.3Siemens ProductCERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8Siemens ProductCERTCVSS:3.1/AV:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

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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