No exploitation reported

CVE-2017-6028

No exploitation reported by the sources we read.

Published2017-06-30
WeaknessCWE-522

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.

Timeline

dates in UTC

2017-06-3003:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-6028?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-6028?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Schneider-electric modicon m241 firmwareversion to verify

Branch	Affected	Fixed in	Source
4.0	≤ 4.0.3.20	no fix published	NVD

Schneider-electric modicon m251 firmwareversion to verify

Branch	Affected	Fixed in	Source
4.0	≤ 4.0.3.20	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-17-089-02 CISA5 known affected
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 · Modicon M251: all versions · +2 more

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-17-089-02 · 5 productsSchneider Electric has released new firmware versions to address the predictable value range from previous values vulnerability and the use of insufficiently random values vulnerability, which are available through Schneider Electric's software update tool, SoMachine, Version 4.2, and SoMachineBasi…
Mitigation from the vendor CISA ICSA-17-089-02 · 5 productsSoMachineBasic, Version 1.5, is available
Mitigation from the vendor CISA ICSA-17-089-02 · 5 productsVerify that the hardware and software infrastructure that the PLCs are integrated into (along with all organizational measures and rules covering access to the infrastructure) consider the results of the hazard and risk analysis, and are implemented according to best practices and standards such as…
Mitigation from the vendor CISA ICSA-17-089-02 · 5 productsLimit traffic on the local network with managed switches
Mitigation from the vendor CISA ICSA-17-089-02 · 5 productsWhere possible, avoid using Wi-Fi networks, but when Wi-Fi is essential, use only secure communications (such as WPA2 encryption)
Mitigation from the vendor CISA ICSA-17-089-02 · 5 productsDo not grant [network] access to unknown computers

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-522read 2026-10-23
NVDweakness (CWE)CWE-522read 2026-10-23
FIRST EPSSEPSS score2.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2017-06-30
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-6028?

Is CVE-2017-6028 actively exploited?

Active exploitation of CVE-2017-6028 has not been confirmed. Its EPSS score was 2.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-6028?

CVE-2017-6028 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running Schneider Electric Modicon PLCs? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database