CVE-2021-37200Network attack vector

Arbitrary file disclosure via HTTP path traversal

Published Sep 14, 2021 · Updated Aug 4, 2024

Path traversal in Siemens SINEC NMS before 1.0 SP1 allows remote authenticated users to download arbitrary files via crafted HTTP requests. The webserver resolves attacker-controlled path input without confining access to the intended directory, exposing files from the underlying filesystem. Access to the webserver is required, and the published impact is read-only disclosure rather than file modification or service interruption.

CVSS severity7.7
High
EPSS probability37.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Siemens SINEC NMS before 1.0 SP1 allows remote authenticated users to download arbitrary files via crafted HTTP requests. The webserver resolves attacker-controlled path input without confining access to the intended directory, exposing files from the underlying filesystem. Access to the webserver is required, and the published impact is read-only disclosure rather than file modification or service interruption.

The record

CVE
CVE-2021-37200
Published
Sep 14, 2021
Updated
Aug 4, 2024
Vendor
Siemens
Product
SINEC NMS
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 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 < V1.0 SP1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · SINEC NMSversion=All versions < V1.0 SP1

Published CVSS scores

7.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N

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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

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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