CVE-2020-25240Network attack vector

Authenticated unauthorized service access via guessed URLs

Published Mar 15, 2021 · Updated Aug 4, 2024

Incorrect authorization in Siemens SINEMA Remote Connect Server before 3.0 allows remote authenticated users to access unauthorized services. Web Based Management routes guessable service URLs without enforcing the unprivileged account's authorization for those endpoints. An unprivileged account is required; exposed services permit log and template disclosure, unauthorized changes, and service interruption.

CVSS severity8.8
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Siemens SINEMA Remote Connect Server before 3.0 allows remote authenticated users to access unauthorized services. Web Based Management routes guessable service URLs without enforcing the unprivileged account's authorization for those endpoints. An unprivileged account is required; exposed services permit log and template disclosure, unauthorized changes, and service interruption.

The record

CVE
CVE-2020-25240
Published
Mar 15, 2021
Updated
Aug 4, 2024
Vendor
Siemens
Product
SINEMA Remote Connect Server
Classifications
CWE-863, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=All versions < V3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · SINEMA Remote Connect Serverversion=All versions < V3.0

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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