How severe is CVE-2018-7810?

CVE-2018-7810 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-2018-7810 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-7810?

CVE-2018-7810 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-2018-7810?

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

When was CVE-2018-7810 published?

CVE-2018-7810 was published on 2018-11-30 and last updated on 2026-06-17.

CVE-2018-7810

CVE-2018-7810 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Schneider-electric Modicom M340 Firmware
Published: 2018-11-30
Last modified: 2026-06-17

Description

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an attacker to craft a URL containing JavaScript that will be executed within the user's browser, potentially impacting the machine the browser is running on.

Frequently asked questions

What is CVE-2018-7810?: An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an attacker to craft a URL containing JavaScript that will be executed within the user's browser, potentially impacting the machine the browser is running on.
How severe is CVE-2018-7810?: CVE-2018-7810 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-2018-7810 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-7810?: CVE-2018-7810 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-2018-7810?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-7810 published?: CVE-2018-7810 was published on 2018-11-30 and last updated on 2026-06-17.

References

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:*:*:*:*:*:*:*:*

More vulnerabilities in Schneider-electric Modicom M340 Firmware

CVE-2018-7811 — Critical (CVSS 9.8): An Unverified Password Change vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum…
CVE-2018-7809 — Critical (CVSS 9.8): An Unverified Password Change vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum…
CVE-2018-7831 — High (CVSS 8.8): An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability exists in the embedded…
CVE-2018-7833 — High (CVSS 7.5): An Improper Check for Unusual or Exceptional Conditions vulnerability exists in the embedded web servers in all Modicon…
CVE-2018-7812 — High (CVSS 7.5): An Information Exposure through Discrepancy vulnerability exists in the embedded web servers in all Modicon M340,…
CVE-2018-7830 — High (CVSS 7.5): Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability exists in the…

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