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CVE-2021-22743

LOW
3.9
CVSS Score
Published: May 26, 2021 at 07:20 PM UTC
Updated: June 17, 2026 at 03:37 AM UTC
4 products affected across 1 vendorTcm 4351B FirmwareTriconex Model 3009 Mp FirmwareTriconex Model 3009 MP

Using Triconex TCM 4351B installed on Tricon V11.3.x systems. by N/A?

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Severity
LOW3.9
Exploit prediction
EPSS 0.2%

Description

Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex TCM 4351B installed on Tricon V11.3.x systems that could cause module reset when TCM receives malformed TriStation packets while the write-protect keyswitch is in the program position.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tcm 4351B Firmware· Schneider Electric
95%
11.3.0 ≤ v < 11.5.111.7.0
Affected range stops below 11.5.1, so it looks safe — our inference, not a vendor statement
schneider-electric-tcm-4351b (same device)
Triconex Model 3009 Mp Firmware· Schneider Electric
95%
11.3.0 ≤ v < 11.8.0
Affected range stops below 11.8.0, so it looks safe — our inference, not a vendor statement
schneider-electric-triconex-model-3009-mp (same device)
Triconex TCM 4351B· Schneider Electric
60%
All versions
Triconex Model 3009 MP· Schneider Electricdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-03

CVSS

3.9LOW[email protected]
Attack Vector
PHYSICAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-754

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