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Fencer Vulns
high 7.5

CVE-2021-22786 json

A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the con…

published 2023-02-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9921

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)

Patch / fix

  • Schneider Electric Modicon M340 CPU (part numbers BMXP34*) V3.30
  • Schneider Electric Modicon M580 CPU (part numbers BMEP* and BMEH*) V3.20
  • Schneider Electric Modicon MC80 (BMKC80) V1.6
  • Schneider Electric Modicon Momentum CPU (171CBU*) V2.3

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

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

Affected products

  • Schneider Electric Modicon M340 CPU (part numbers BMXP34*)
  • Schneider Electric Modicon M580 CPU (part numbers BMEP* and BMEH*)
  • Schneider Electric Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S)
  • Schneider Electric Modicon MC80 (BMKC80)
  • Schneider Electric Modicon Momentum CPU (171CBU*)
  • Schneider Electric Legacy Modicon Quantum

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.