THREATPORT/VULNERABILITY/CVE-2018-7812
HIGH SEVERITY

CVE-2018-7812

Modicom M340 Firmware vulnerability

CVSS
7.5
EPSS
3.7%
EPSS pct
89th
Exploited
No known
An Information Exposure through Discrepancy vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where the web server sends different responses in a way that exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
Affected vendor
Schneider Electric
Affected product
Modicom M340 Firmware
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness type (CWE)
  • CWE-200 — Exposure of Sensitive Information
Published
2018-12-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 3.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2018-7812

  • Confirm whether Schneider Electric Modicom M340 Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-7812.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-7812

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-7812 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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