Security readout for executives and security teams
This affects certain Schneider Electric Modicon PLC firmware versions that generated predictable TCP connection sequence numbers. An attacker with network access could potentially spoof or disrupt TCP connections to the controller. This is an industrial control systems issue with integrity and availability impact, not a data-theft vulnerability. Exposure is most likely in industrial environments using Schneider Electric Modicon M221, M241, or M251 PLCs on affected firmware. Risk increases where PLC management or operational networks are reachable by untrusted users or poorly segmented networks. Treat as a targeted industrial-network hardening item, not an internet-scale emergency based on available sources. Prioritize if affected PLCs support safety, production continuity, or critical processes, especially where segmentation is weak or remote access paths exist. Mitigation focus: Inventory Modicon M221, M241, and M251 PLC firmware versions.; Upgrade M221 firmware to 1.5.0.0 or later where applicable.; Upgrade M241 and M251 firmware to 4.0.5.11 or later where applicable..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-343: Exact CWE lookup
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Open ATT&CK lookupCVE-2017-6030 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
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SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L3.92.5CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02CVE reference, icscert · x_refsource_MISC
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2017/icsa-17-089-02.jsonCVE reference, icscert
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Predictable Value Range from Previous Values
Predictable Value Range from Previous Values represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.