← Vulnerability feed

Vulnerability record · CVE-2017-6030 · published 30 June 2017

CVE-2017-6030: Schneider-electric modicon m241 firmware vulnerability

Schneider Electric · Modicon M241 Firmware

A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The affected products generate insufficiently random TCP initial sequence numbers that may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections.

6.5 CVSS 3.1 Medium EPSS 2.1% · top 18.7% CWE-343 · CWE-343CWE-331 · CWE-331
6.5CVSS 3.1 base score, v2 6.4
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

Description

A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The affected products generate insufficiently random TCP initial sequence numbers that may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/97254 Third Party AdvisoryVDB Entry
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2017/icsa-17-089-02.json
https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02 Third Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/97254 Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02 Third Party AdvisoryUS Government Resource

Track CVE-2017-6030 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-7489Schneider-electric ecostruxure machine expert injection vulnerabilityA CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability exists on EcoStruxure Mach…EPSS 1.6%9.8CVE-2020-7487Schneider-electric ecostruxure machine expert insufficient verification of data authenticity vulnerabilityA CWE-345: Insufficient Verification of Data Authenticity vulnerability exists which could allow the attacker to execute malicious code on the Modico…EPSS 0.69%9.8CVE-2018-7790Schneider-electric modicon m221 firmware authentication bypass by capture-replay vulnerabilityAn Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.…EPSS 2.5%9.8CVE-2018-7791Schneider-electric modicon m221 firmware improper authentication vulnerabilityA Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior t…EPSS 1.9%9.8CVE-2017-6028Schneider-electric modicon m241 firmware insufficiently protected credentials vulnerabilityAn Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251…EPSS 2.3%9.1CVE-2017-6026Schneider-electric modicon m251 firmware vulnerabilityA Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.…EPSS 32%8.2CVE-2019-6820Schneider-electric modicon m100 firmware missing authentication for critical function vulnerabilityA CWE-306: Missing Authentication for Critical Function vulnerability exists which could cause a modification of device IP configuration (IP address,…EPSS 1.3%7.5CVE-2021-22699Schneider-electric modicon m241 firmware improper input validation vulnerabilityImproper Input Validation vulnerability exists in Modicon M241/M251 logic controllers firmware prior to V5.1.9.1 that could cause denial of service w…EPSS 0.98%

Source: NIST National Vulnerability Database (record CVE-2017-6030), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.