CVE-2021-33725Network attack vector

Arbitrary file deletion via unchecked relative paths

Published Oct 12, 2021 · Updated Aug 3, 2024

Path traversal in Siemens SINEC NMS before 1.0 SP2 Update 1 allows remote authenticated users to delete arbitrary files or directories. A server-side path check accepts a user-controlled relative path without confirming that the resolved path remains inside the intended target directory. High-privileged access to the HTTPS service is required, and deletion of application or system content can interrupt service.

CVSS severity9.1
Critical
EPSS probability1.03%
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 SP2 Update 1 allows remote authenticated users to delete arbitrary files or directories. A server-side path check accepts a user-controlled relative path without confirming that the resolved path remains inside the intended target directory. High-privileged access to the HTTPS service is required, and deletion of application or system content can interrupt service.

The record

CVE
CVE-2021-33725
Published
Oct 12, 2021
Updated
Aug 3, 2024
Vendor
Siemens
Product
SINEC NMS
Classifications
CWE-22, T1485
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 SP2 Update 1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Siemens · SINEC NMSversion=All versions < V1.0 SP2 Update 1

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

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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