CVE-2021-33730

mediumpriority · track · 39EPSS 0.277 · 98 %ileDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

27.7% (98th) EPSS

CVSS 6.5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP2 Update 1). A privileged authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the webserver of the affected application.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSINEC NMSsiemens_psirt
Update to V1.0 SP2 Update 1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802731/
FixedSINEC NMScisa_csaf_ot
Update to V1.0 SP2 Update 1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802731/
MitigationSINEC NMSsiemens_psirt
Restrict access to the affected systems, especially to port 443/tcp, to trusted IP addresses only
MitigationSINEC NMScisa_csaf_ot
Restrict access to the affected systems, especially to port 443/tcp, to trusted IP addresses only

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.2

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.2 · impact 5.9

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-89USCWE-89USCWE-89US

affected products (6)

Products and version ranges known to be affected.

SINEC NMSall versionscisa_csaf_otUS
Siemens SINEC NMS< V1.0_SP2_Update_1cisa_csaf_otUS
Siemens SINEC NMSAll versions → V1.0 SP2 Update 1enisa_euvdEU
siemens sinec nms< 1.0nvdUScpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:*
siemens sinec nms= 1.0nvdUScpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:*
Siemens SINEC NMS< V1.0 SP2 Update 1siemens_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-163251SSA-163251: Multiple Vulnerabilities in SINEC NMS2021-10-12csaf · siemens_psirtDE
The latest update for SINEC NMS fixes multiple vulnerabilities. The most severe could allow an authenticated remote attacker to execute arbitrary code on the system, with system privileges, under certain conditions. Siemens has released an update for SINEC NMS and recommends to update to the latest version.
ICSA-21-287-05Siemens SINEC NMS2021-10-12icsa · cisa_csaf_otUS
The latest update for SINEC NMS fixes multiple vulnerabilities. The most severe could allow an authenticated remote attacker to execute arbitrary code on the system, with system privileges, under certain conditions. Siemens has released an update for SINEC NMS and recommends to update to the latest version.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2021-10-12modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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