How severe is CVE-2021-22746?

CVE-2021-22746 has a CVSS 3.x base score of 3.9, rated low severity. It is exploitable over physical access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22746 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22746?

CVE-2021-22746 primarily affects Schneider-electric Triconex Model 3009 Mp Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22746?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22746 published?

CVE-2021-22746 was published on 2021-05-26 and last updated on 2026-06-17.

CVE-2021-22746

CVE-2021-22746 is a low-severity vulnerability in Schneider-electric Triconex Model 3009 Mp Firmware with a CVSS 3.x base score of 3.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-754.

Key facts

Severity: Low (CVSS 3.x base score 3.9)
CVSS v2: 2.1
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-754
Affected product: Schneider-electric Triconex Model 3009 Mp Firmware
Published: 2021-05-26
Last modified: 2026-06-17

Description

Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP 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. This CVE ID is unique from CVE-2021-22742, CVE-2021-22744, CVE-2021-22745, and CVE-2021-22747.

Frequently asked questions

What is CVE-2021-22746?: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP 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. This CVE ID is unique from CVE-2021-22742, CVE-2021-22744, CVE-2021-22745, and CVE-2021-22747.
How severe is CVE-2021-22746?: CVE-2021-22746 has a CVSS 3.x base score of 3.9, rated low severity. It is exploitable over physical access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22746 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22746?: CVE-2021-22746 primarily affects Schneider-electric Triconex Model 3009 Mp Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22746?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22746 published?: CVE-2021-22746 was published on 2021-05-26 and last updated on 2026-06-17.

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-03

Affected products (3)

cpe:2.3:o:schneider-electric:triconex_model_3009_mp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tcm_4351b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tcm_4351b_firmware:11.7.0:*:*:*:*:*:*:*

More vulnerabilities in Schneider-electric Triconex Model 3009 Mp Firmware

CVE-2021-22747 — Low (CVSS 3.9): Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon…
CVE-2021-22745 — Low (CVSS 3.9): Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon…
CVE-2021-22744 — Low (CVSS 3.9): Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon…
CVE-2021-22743 — Low (CVSS 3.9): Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex TCM 4351B installed on Tricon…
CVE-2021-22742 — Low (CVSS 3.9): Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon…

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