CVE-2023-6874

highpriority · track · 30OT risk · elevatedEPSS 0.004 · 29 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.35% (29th) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

Prior to v7.4.0, Ember ZNet is vulnerable to a denial of service attack through manipulation of the NWK sequence number

remediations

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

A vendor fix is available.

FixedSIRIUS 3RV2921-5Msiemens_psirt
Update to V5.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109797242/
FixedSIRIUS 3RV2921-5Mcisa_csaf_ot
Update to V5.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109797242/
MitigationSIRIUS 3RV2921-5Msiemens_psirt
Mitigate through physical isolation
MitigationSIRIUS 3RV2921-5Mcisa_csaf_ot
Mitigate through physical isolation

cvss

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

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–8.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · product-security@silabs.comexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Siemens ProductCERT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USprimaryCWE-312USCWE-312USCWE-754USCWE-754USCWE-754USCWE-754US

affected products (9)

Products and version ranges known to be affected.

SIRIUS 3RV2921-5Mall versionscisa_csaf_otUS
Siemens SIRIUS 3RV2921-5M≤ vers:all/<V5.1cisa_csaf_otUS
silabs.com GSDKall versionsenisa_euvdEU
silabs.com GSDK0.0 → 7.4.0enisa_euvdEU
Siemens AG Siemens SENTRON 3KC ATC6 Expansion Module Ethernetall versionsfstec_bduRU
Silicon Labs Ember ZNet≤ 7.4.0fstec_bduRU
sentron_powercenter_1000__7kn1110-0mc00_all versionsncsc_nlNLcpe:2.3:a:siemens:sentron_powercenter_1000__7kn1110-0mc00_:*:*:*:*:*:*:*:*
silabs gecko software development kit< 4.4.0nvdUScpe:2.3:a:silabs:gecko_software_development_kit:*:*:*:*:*:*:*:*
Siemens SIRIUS 3RV2921-5M≤ vers:all/<V5.1siemens_psirtDE

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2024-0390Kwetsbaarheden verholpen in Siemens productenNL2024-10-08csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als Questa/ModelSIM, RUGGEDCOM, SENTRON, SIMATIC, SINEC, Tecnomatix en Teamcenter.
SSA-340240SSA-340240: Denial of Service Vulnerability in SIRIUS 3RV2921-5M2024-10-08csaf · siemens_psirtDE
A vulnerability in SIRIUS 3RV2921-5M could allow an attacker to cause a denial of service condition. Siemens has released a new version for SIRIUS 3RV2921-5M and recommends to update to the latest version.
ICSA-24-284-12Siemens Sentron Powercenter 10002024-10-08icsa · cisa_csaf_otUS
A vulnerability in SIRIUS 3RV2921-5M could allow an attacker to cause a denial of service condition. Siemens has released a new version for SIRIUS 3RV2921-5M and recommends to update to the latest version.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot ncsc_nl nvd siemens_psirt NVD CVE.org MITRE

published 2024-02-05modified 2026-06-17

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references (7)

External citations — patches, advisories, analysis.

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