CVE-2021-44165

highpriority · track · 30EPSS 0.027 · 86 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.67% (86th) EPSS

CVSS 9 · high

Is it mine?

16 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

A vulnerability has been identified in POWER METER SICAM Q100 (All versions < V2.41), POWER METER SICAM Q100 (All versions < V2.41), POWER METER SICAM Q100 (All versions < V2.41), POWER METER SICAM Q100 (All versions < V2.41). The affected firmware contains a buffer overflow vulnerability in the web application that could allow a remote attacker with engineer or admin priviliges to potentially perform remote code execution.

remediations

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

A vendor fix is available.

FixedPOWER METER SICAM Q100siemens_psirt
Update to V2.41 or later version
https://support.industry.siemens.com/cs/ww/en/view/109743524
FixedPOWER METER SICAM Q100cisa_csaf_ot
Update to V2.41 or later version
https://support.industry.siemens.com/cs/ww/en/view/109743524
MitigationPOWER METER SICAM Q100siemens_psirt
Restrict access to the web server e.g. with a firewall and ensure that the privileged accounts are protected by strong passwords.
MitigationPOWER METER SICAM Q100cisa_csaf_ot
Restrict access to the web server e.g. with a firewall and ensure that the privileged accounts are protected by strong passwords.

cvss

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

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.6–9.1

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8 · impact 10

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

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.17.2highAV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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-121USCWE-121USCWE-121USCWE-121US

affected products (16)

Products and version ranges known to be affected.

POWER METER SICAM Q100 (7KG9501-0AA01-0AA1)all versionscisa_csaf_otUS
POWER METER SICAM Q100 (7KG9501-0AA01-2AA1)all versionscisa_csaf_otUS
POWER METER SICAM Q100 (7KG9501-0AA31-0AA1)all versionscisa_csaf_otUS
POWER METER SICAM Q100 (7KG9501-0AA31-2AA1)all versionscisa_csaf_otUS
Siemens POWER METER SICAM Q100< V2.41cisa_csaf_otUS
Siemens POWER METER SICAM Q100All versions → V2.41enisa_euvdEU
Siemens AG POWER METER SICAM Q100≤ 2.41fstec_bduRU
siemens 7kg9501-0aa01-0aa1 firmware< 2.41nvdUScpe:2.3:o:siemens:7kg9501-0aa01-0aa1_firmware:*:*:*:*:*:*:*:*
siemens 7kg9501-0aa01-2aa1 firmware< 2.41nvdUScpe:2.3:o:siemens:7kg9501-0aa01-2aa1_firmware:*:*:*:*:*:*:*:*
siemens 7kg9501-0aa31-0aa1 firmware< 2.41nvdUScpe:2.3:o:siemens:7kg9501-0aa31-0aa1_firmware:*:*:*:*:*:*:*:*
siemens 7kg9501-0aa31-2aa1 firmware< 2.41nvdUScpe:2.3:o:siemens:7kg9501-0aa31-2aa1_firmware:*:*:*:*:*:*:*:*
Siemens POWER METER SICAM Q100< V2.41siemens_psirtDE
Siemens POWER METER SICAM Q100 (7KG9501-0AA01-0AA1)< V2.41siemens_psirtDE
Siemens POWER METER SICAM Q100 (7KG9501-0AA01-2AA1)< V2.41siemens_psirtDE
Siemens POWER METER SICAM Q100 (7KG9501-0AA31-0AA1)< V2.41siemens_psirtDE
Siemens POWER METER SICAM Q100 (7KG9501-0AA31-2AA1)< V2.41siemens_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-496292SSA-496292: Remote Code Execution Vulnerability in POWER METER SICAM Q1002021-12-14csaf · siemens_psirtDE
POWER METER SICAM Q100 contains a vulnerability that could allow an attacker to remotely execute code. Siemens has released updates for the affected products and recommends to update to the latest versions.
ICSA-21-350-07Siemens POWER METER SICAM Q1002021-12-14icsa · cisa_csaf_otUS
POWER METER SICAM Q100 contains a vulnerability that could allow an attacker to remotely execute code. Siemens has released updates for the affected products and recommends to update to the latest versions.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2021-12-14modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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