CVE-2020-7562

mediumpriority · track · 32EPSS 0.009 · 60 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.91% (60th) EPSS
CVSS 5.8 · medium
Is it mine?
56 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

A CWE-125: Out-of-Bounds Read vulnerability exists in the Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details) which could cause a segmentation fault or a buffer overflow when uploading a specially crafted file on the controller over FTP.

01

remediations

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

No vendor fix yet; a mitigation is available.

  • MitigationM340 CPUs BMX P34xcisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationM340 Communication Ethernet modules BMX NOC 0401cisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationM340 Communication Ethernet modules BMX NOE 0100 (H)cisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationM340 Communication Ethernet modules BMX NOE 0110 (H)cisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationM340 Communication Ethernet modules BMX NOR 0200Hcisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationPremium communication modulescisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationPremium processors with integrated Ethernet COPRO TSXP574634 TSXP575634 TSXP576634cisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationQuantum communication modules 140NOC77101cisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationQuantum communication modules 140NOC78x00cisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationQuantum communication modules 140NOE771x1cisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

  • MitigationQuantum processors with integrated Ethernet COPRO 140CPU65xxxxxcisa_csaf_ot

    Configure the access control list via Ecostruxure Control Expert programming tool.

02

cvss

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

8.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–8.1

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 4.9
v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.2
v3.06.3mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Hsecondary · CISA US
v3.18.1highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Hsecondary · ENISA EU
v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Hsecondaryexploitability 2.1 · impact 4.2
v3.17.4highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
03

ssvc

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

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USCWE-125USCWE-125US
05

affected products (56)

Products and version ranges known to be affected.

showing 20 of 56
06

advisories (1)

Vendor and ecosystem advisories describing this.

  • ICSA-21-005-01Schneider Electric Web Server on Modicon M3402021-01-05icsa · cisa_csaf_otUS

    Successful exploitation of these vulnerabilities may allow write access and the execution of commands, which could result in data corruption or a web server crash.

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otNVDCVE.orgMITRE
published 2020-11-18modified 2026-06-17
09

references (6)

External citations — patches, advisories, analysis.

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