CVE-2024-39869Network attack vector

Permanent service interruption via crafted certificate upload

Published Jul 9, 2024 · Updated Aug 27, 2025

Improper certificate handling in Siemens SINEMA Remote Connect Server before V3.2 SP1 allows remote authenticated users to interrupt service. The certificate-upload workflow accepts a crafted certificate and mishandles it as an exceptional condition; Siemens has not disclosed the triggering certificate field. Low-privilege authenticated network access to certificate upload is required, and service remains unavailable until the offending certificate is manually removed.

CVSS severity7.1
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate handling in Siemens SINEMA Remote Connect Server before V3.2 SP1 allows remote authenticated users to interrupt service. The certificate-upload workflow accepts a crafted certificate and mishandles it as an exceptional condition; Siemens has not disclosed the triggering certificate field. Low-privilege authenticated network access to certificate upload is required, and service remains unavailable until the offending certificate is manually removed.

The record

CVE
CVE-2024-39869
Published
Jul 9, 2024
Updated
Aug 27, 2025
Vendor
Siemens
Product
SINEMA Remote Connect Server
Classifications
CWE-754, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2025Record 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 <V3.2 SP1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · SINEMA Remote Connect Serverversion=0 <V3.2 SP1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1Siemens ProductCERTCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

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

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499.004Application or System Exploitation

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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