CVE-2021-33736Network attack vector

Privileged SQL command execution via crafted web requests

Published Oct 12, 2021 · Updated Aug 3, 2024

SQL injection in Siemens SINEC NMS before V1.0 SP2 Update 1 allows privileged authenticated attackers to execute arbitrary commands in the local database via crafted webserver requests. The webserver fails to properly neutralize SQL command elements in attacker-controlled request data, allowing database command execution. Exploitation requires privileged authenticated access to the SINEC NMS web interface; consequences include database confidentiality, integrity, and availability loss.

CVSS severity7.2
High
EPSS probability1.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Siemens SINEC NMS before V1.0 SP2 Update 1 allows privileged authenticated attackers to execute arbitrary commands in the local database via crafted webserver requests. The webserver fails to properly neutralize SQL command elements in attacker-controlled request data, allowing database command execution. Exploitation requires privileged authenticated access to the SINEC NMS web interface; consequences include database confidentiality, integrity, and availability loss.

The record

CVE
CVE-2021-33736
Published
Oct 12, 2021
Updated
Aug 3, 2024
Vendor
Siemens
Product
SINEC NMS
Classifications
CWE-89, T1190
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

7.2Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

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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