CVE-2024-23811

Remote code execution via unrestricted TFTP uploads

Published Feb 13, 2024 · Updated Aug 27, 2024

Unrestricted file upload in Siemens SINEC NMS before 2.0 SP1 allows remote attackers to upload arbitrary files via TFTP. The TFTP upload path accepts attacker-supplied firmware images or other files without restricting dangerous file types. Network adjacency is required, and a malicious uploaded file can execute code on the SINEC NMS host.

CVSS severity9.4
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Siemens SINEC NMS before 2.0 SP1 allows remote attackers to upload arbitrary files via TFTP. The TFTP upload path accepts attacker-supplied firmware images or other files without restricting dangerous file types. Network adjacency is required, and a malicious uploaded file can execute code on the SINEC NMS host.

The record

CVE
CVE-2024-23811
Published
Feb 13, 2024
Updated
Aug 27, 2024
Vendor
Siemens
Product
SINEC NMS
Classifications
CWE-434, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=0 <V2.0 SP1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · SINEC NMSversion=0 <V2.0 SP1

Published CVSS scores

8.8Siemens AGCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.4Siemens AGCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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