How severe is CVE-2018-7804?

CVE-2018-7804 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-7804 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-7804?

CVE-2018-7804 primarily affects Schneider-electric Modicom M340 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-7804?

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

When was CVE-2018-7804 published?

CVE-2018-7804 was published on 2018-12-17 and last updated on 2026-06-17.

CVE-2018-7804

CVE-2018-7804 is a medium-severity vulnerability in Schneider-electric Modicom M340 Firmware with a CVSS 3.x base score of 6.1. 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-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Schneider-electric Modicom M340 Firmware
Published: 2018-12-17
Last modified: 2026-06-17

Description

A URL Redirection to Untrusted Site vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a user clicking on a specially crafted link can be redirected to a URL of the attacker's choosing.

Frequently asked questions

What is CVE-2018-7804?: A URL Redirection to Untrusted Site vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a user clicking on a specially crafted link can be redirected to a URL of the attacker's choosing.
How severe is CVE-2018-7804?: CVE-2018-7804 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-7804 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-7804?: CVE-2018-7804 primarily affects Schneider-electric Modicom M340 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-7804?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-7804 published?: CVE-2018-7804 was published on 2018-12-17 and last updated on 2026-06-17.

References

https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/

Affected products (4)

cpe:2.3:o:schneider-electric:modicom_m340_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicom_premium_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicom_quantum_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicom_bmxnor0200h_firmware:*:*:*:*:*:*:*:*

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