How severe is CVE-2020-28214?

CVE-2020-28214 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-28214 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28214?

CVE-2020-28214 affects Schneider-electric Modicon M221 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28214?

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

When was CVE-2020-28214 published?

CVE-2020-28214 was published on 2020-12-11 and last updated on 2026-06-17.

CVE-2020-28214

CVE-2020-28214 is a medium-severity vulnerability in Schneider-electric Modicon M221 Firmware with a CVSS 3.x base score of 5.5. 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-760.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-760
Affected product: Schneider-electric Modicon M221 Firmware
Published: 2020-12-11
Last modified: 2026-06-17

Description

A CWE-760: Use of a One-Way Hash with a Predictable Salt vulnerability exists in Modicon M221 (all references, all versions), that could allow an attacker to pre-compute the hash value using dictionary attack technique such as rainbow tables, effectively disabling the protection that an unpredictable salt would provide.

Frequently asked questions

What is CVE-2020-28214?: A CWE-760: Use of a One-Way Hash with a Predictable Salt vulnerability exists in Modicon M221 (all references, all versions), that could allow an attacker to pre-compute the hash value using dictionary attack technique such as rainbow tables, effectively disabling the protection that an unpredictable salt would provide.
How severe is CVE-2020-28214?: CVE-2020-28214 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-28214 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28214?: CVE-2020-28214 affects Schneider-electric Modicon M221 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28214?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-28214 published?: CVE-2020-28214 was published on 2020-12-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:*

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