Vulnerability Snapshot
CVE-2018-7761 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.
Affected technology: bmxnor0200_firmware, bmxnor0200, bmxnor0200h_firmware, bmxnor0200h, 140cpu65150_firmware, plus 5 other product variants.
Executive Summary
A vulnerability exists in the HTTP request parser in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200 which could allow arbitrary code execution.
Why It Matters
CVE-2018-7761 is rated CRITICAL severity, requiring immediate attention from security teams.
CVSS Base Score: 9.8/10
Affected Technologies
Vendors: schneider-electric
Products: bmxnor0200_firmware, bmxnor0200, bmxnor0200h_firmware, bmxnor0200h, 140cpu65150_firmware, 140cpu65150, 140cpu31110_firmware, 140cpu31110, 140cpu43412u_firmware, 140cpu43412u, 140cpu65160_firmware, 140cpu65160, 140cpu65260_firmware, 140cpu65260, 140cpu65860_firmware, 140cpu65860, 140cpu65160s_firmware, 140cpu65160s, 140cpu65150c_firmware, 140cpu65150c, 140cpu31110c_firmware, 140cpu31110c, 140cpu43412uc_firmware, 140cpu43412uc, 140cpu65160c_firmware, 140cpu65160c, 140cpu65260c_firmware, 140cpu65260c, 140cpu65860c_firmware, 140cpu65860c, modicon_m340_bmxp341000_firmware, modicon_m340_bmxp341000, modicon_m340_bmxp342000_firmware, modicon_m340_bmxp342000, modicon_m340_bmxp3420102_firmware, modicon_m340_bmxp3420102, modicon_m340_bmxp3420102cl_firmware, modicon_m340_bmxp3420102cl, modicon_m340_bmxp342020_firmware, modicon_m340_bmxp342020, modicon_m340_bmxp3420302_firmware, modicon_m340_bmxp3420302, modicon_m340_bmxp3420302cl_firmware, modicon_m340_bmxp3420302cl, modicon_m340_bmxp3420302h_firmware, modicon_m340_bmxp3420302h, modicon_m340_bmxp342020h_firmware, modicon_m340_bmxp342020h, modicon_m340_bmxp341000h_firmware, modicon_m340_bmxp341000h, tsxh5724m_firmware, tsxh5724m, tsxh5744m_firmware, tsxh5744m, tsxp57104m_firmware, tsxp57104m, tsxp57154m_firmware, tsxp57154m, tsxp571634m_firmware, tsxp571634m, tsxp57204m_firmware, tsxp57204m, tsxp57254m_firmware, tsxp57254m, tsxp572634m_firmware, tsxp572634m, tsxp57304m_firmware, tsxp57304m, tsxp57354m_firmware, tsxp57354m, tsxp573634m_firmware, tsxp573634m, tsxp57454m_firmware, tsxp57454m, tsxp574634m_firmware, tsxp574634m, tsxp575634m_firmware, tsxp575634m, tsxp576634m_firmware, tsxp576634m, tsxh5724mc_firmware, tsxh5724mc, tsxh5744mc_firmware, tsxh5744mc, tsxp57104mc_firmware, tsxp57104mc, tsxp57154mc_firmware, tsxp57154mc, tsxp571634mc_firmware, tsxp571634mc, tsxp57204mc_firmware, tsxp57204mc, tsxp57254mc_firmware, tsxp57254mc, tsxp572634mc_firmware, tsxp572634mc, tsxp57304mc_firmware, tsxp57304mc, tsxp57354mc_firmware, tsxp57354mc, tsxp573634mc_firmware, tsxp573634mc, tsxp57454mc_firmware, tsxp57454mc, tsxp574634mc_firmware, tsxp574634mc, tsxp57554mc_firmware, tsxp57554mc, tsxp575634mc_firmware, tsxp575634mc, tsxp576634mc_firmware, tsxp576634mc, tsxp57554m_firmware, tsxp57554m
🛡️What Defenders Should Check
Use Vulnios to continuously monitor your exposure to CVE-2018-7761 and similar vulnerabilities.
References & Sources
How Vulnios Detects This
Vulnios scans for this vulnerability using Trivy and Grype for SBOM-based CVE matching and Vulnios CVE feed continuous monitoring against your asset inventory. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.
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Affected Products
Sources
Related Threat Alerts
- Critical Vulnerability: CVE-2020-28221 — schneider-electric — ecostruxure_operator_terminal_expert, hmi_sto_501
- Critical Vulnerability: CVE-2020-7540 — schneider-electric — modicon_m340_bmxp341000_firmware, modicon_m340_bmxp341000
- Critical Vulnerability: CVE-2020-28215 — schneider-electric — easergy_t300_firmware, easergy_t300
- Critical Vulnerability: CVE-2020-7561 — schneider-electric — easergy_t300_firmware, easergy_t300
- Critical Vulnerability: CVE-2020-7548 — schneider-electric — acti9_smartlink_si_d_firmware, acti9_smartlink_si_d
- Critical Vulnerability: CVE-2020-7533 — schneider-electric — modicon_m340_bmxp3420302_firmware, modicon_m340_bmxp3420302
Frequently Asked Questions
What is CVE-2018-7761?
CVE-2018-7761 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. A vulnerability exists in the HTTP request parser in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200 which could allow arbitrary code execution.
Am I affected?
Check whether your environment runs bmxnor0200_firmware, bmxnor0200, bmxnor0200h_firmware, bmxnor0200h, 140cpu65150_firmware. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.
How urgent is the response?
Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.
How do I remediate?
Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.
Where can I track exploitation activity?
Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2018-7761. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.
How does Vulnios help with this?
Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.
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