CVE-2021-34574

mediumpriority · track · 16EPSS 0.007 · 51 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.66% (51st) EPSS

CVSS 4 · medium

Is it mine?

14 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · helmholz_psirt · mb_connect_line_psirt

EPSS · scored 2026-10-22

In MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2 an authenticated attacker can change the password of his account into a new password that violates the password policy by intercepting and modifying the request that is send to the server.

remediations

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

A vendor fix is available.

Fixedmb_connect_line_psirt
CVE-2021-34575: Update to 2.9.0 CVE-2021-34574: Update to 2.12.1
No fix availablehelmholz_psirt
no fix available

cvss

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

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.4–4.3

v2.04mediumAV:N/AC:L/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v2.03.4lowAV:N/AC:L/Au:S/C:N/I:P/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · Helmholz PSIRT

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · MB connect line PSIRT

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · info@cert.vde.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · NVD / NIST USexploitability 2.8 · impact 1.4

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-669USCWE-669USCWE-669US

affected products (14)

Products and version ranges known to be affected.

mbCONNECT24≤ 2 ≤2.11.2enisa_euvdEU
myREX24≤ 2 ≤2.11.2enisa_euvdEU
myREX24.virtual≤ 2 ≤2.11.2enisa_euvdEU
mymbCONNECT24≤ 2 ≤2.11.2enisa_euvdEU
Helmholz myREX24≤ 2.11.2helmholz_psirtDE
Helmholz myREX24.virtual≤ 2.11.2helmholz_psirtDE
MB connect line mbCONNECT24all versionsfixedmb_connect_line_psirtDE
MB connect line mbCONNECT24≤ 2.11.2mb_connect_line_psirtDE
MB connect line mymbCONNECT24≤ 2.11.2mb_connect_line_psirtDE
MB connect line mymbCONNECT24all versionsfixedmb_connect_line_psirtDE
helmholz myrex24≤ 2.11.2nvdUScpe:2.3:a:helmholz:myrex24:*:*:*:*:*:*:*:*
helmholz myrex24.virtual≤ 2.11.2nvdUScpe:2.3:a:helmholz:myrex24.virtual:*:*:*:*:*:*:*:*
mbconnectline mbconnect24≤ 2.11.2nvdUScpe:2.3:a:mbconnectline:mbconnect24:*:*:*:*:*:*:*:*
mbconnectline mymbconnect24≤ 2.11.2nvdUScpe:2.3:a:mbconnectline:mymbconnect24:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

VDE-2021-030MB connect line: two vulnerabilities in mymbCONNECT24, mbCONNECT24 (Update A)2022-09-07csaf · mb_connect_line_psirtDE
Two issues have been discovered in mymbCONNECT24 and mbCONNECT24 in all versionsincluding V2.8.0. Updated affected versions (and solution) due to incomplete fixes in previous versions
VDE-2022-039Helmholz: Multiple vulnerabilites in myREX24 and myREX24.virtual2022-09-07csaf · helmholz_psirtDE
Multiple vulnerabilities have been found in myREX24 and myREX24.virtual.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd helmholz_psirt mb_connect_line_psirt nvd NVD CVE.org MITRE

published 2021-08-02modified 2026-06-17

references (8)

External citations — patches, advisories, analysis.

scry

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