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Fencer Vulns
critical 9.8

CVE-2020-7533 json

CWE-287: Improper Authentication vulnerability exists which could cause the execution of commands on the webserver without authentication w…

published 2020-12-01 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-28658

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

CWE-287: Improper Authentication vulnerability exists which could cause the execution of commands on the webserver without authentication when sending specially crafted HTTP requests.

Patch / fix

  • schneider-electric modicon_m340_bmxp3420302_firmware 3.20
  • schneider-electric modicon_m340_bmxp342000_firmware 3.20
  • schneider-electric modicon_m340_bmxp341000_firmware 3.20
  • schneider-electric modicon_m340_bmxp3420102_firmware 3.20
  • schneider-electric bmxnoe0100_firmware 3.3
  • schneider-electric bmxnoe0110_firmware 6.5
  • schneider-electric bmxnoc0401_firmware 2.10
  • schneider-electric tsxp574634_firmware 6.1
  • schneider-electric tsxp575634_firmware 6.1
  • schneider-electric tsxp576634_firmware 6.1
  • schneider-electric tsxety4103_firmware 6.2
  • schneider-electric tsxety5103_firmware 6.4
  • schneider-electric 140noe77111_firmware 7.1
  • schneider-electric 140noc78000_firmware 1.74
  • schneider-electric 140noc77101_firmware 1.08
  • schneider-electric 140cpu65260_firmware 6.1

Exploit prediction

2.34% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see security notification for version information)

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.