{"cve":"CVE-2018-7830","nvd":{"published":"2018-11-30T19:29:00.547","modified":"2026-06-17T02:03:49.110","status":"Modified","description":"Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a denial of service can occur for ~1 minute by sending a specially crafted HTTP request.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-113"],"references":["https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/","https://www.tenable.com/security/research/tra-2018-38","https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/","https://www.tenable.com/security/research/tra-2018-38"],"products":["schneider-electric:modicom_bmxnor0200h_firmware","schneider-electric:modicom_m340_firmware","schneider-electric:modicom_premium_firmware","schneider-electric:modicom_quantum_firmware"],"source":"nvd","synced_at":"2026-10-19T20:53:59.789560037+00:00"},"epss":{"cve":"CVE-2018-7830","score":0.02423,"percentile":0.84193,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}