How severe is CVE-2019-6851?

CVE-2019-6851 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-6851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-6851?

CVE-2019-6851 primarily affects Schneider-electric Modicon M580 Firmware. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-6851?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-6851 published?

CVE-2019-6851 was published on 2019-10-29 and last updated on 2026-06-17.

CVE-2019-6851

CVE-2019-6851 is a high-severity vulnerability in Schneider-electric Modicon M580 Firmware with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 30% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 30% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Schneider-electric Modicon M580 Firmware
Published: 2019-10-29
Last modified: 2026-06-17

Description

A CWE-538: File and Directory Information Exposure vulnerability exists in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions), which could cause the disclosure of information from the controller when using TFTP protocol.

Frequently asked questions

What is CVE-2019-6851?: A CWE-538: File and Directory Information Exposure vulnerability exists in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions), which could cause the disclosure of information from the controller when using TFTP protocol.
How severe is CVE-2019-6851?: CVE-2019-6851 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-6851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-6851?: CVE-2019-6851 primarily affects Schneider-electric Modicon M580 Firmware. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-6851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-6851 published?: CVE-2019-6851 was published on 2019-10-29 and last updated on 2026-06-17.

References

https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-01

Affected products (23)

cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmcpc002m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmcpc512k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfpp001m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfpp002m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfpp004m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfpp512k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpc001m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpc002m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpc003m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpc007m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpc01m7_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpc768k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpf004m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpf008m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfp0128p2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfp064p2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfpp224k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmfpp384k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpc448k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpp224k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tsxmrpp384k_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Schneider-electric Modicon M580 Firmware

CVE-2020-7475 — Critical (CVSS 9.8): A CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'),…
CVE-2019-6808 — Critical (CVSS 9.8): A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon…
CVE-2018-7847 — Critical (CVSS 9.8): A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon…
CVE-2018-7846 — Critical (CVSS 9.8): A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon…
CVE-2018-7842 — Critical (CVSS 9.8): A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340,…
CVE-2019-6848 — High (CVSS 8.6): A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 CPU (BMEx58*) and Modicon…

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