No exploitation reportedFix available

CVE-2017-6021

No exploitation reported by the sources we read.

Published2018-05-14
WeaknessCWE-20

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

In Schneider Electric ClearSCADA 2014 R1 (build 75.5210) and prior, 2014 R1.1 (build 75.5387) and prior, 2015 R1 (build 76.5648) and prior, and 2015 R2 (build 77.5882) and prior, an attacker with network access to the ClearSCADA server can send specially crafted sequences of commands and data packets to the ClearSCADA server that can cause the ClearSCADA server process and ClearSCADA communications driver processes to terminate. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Timeline

dates in UTC

2018-05-1414:29CVE 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-2017-6021?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-6021?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 clearscada

Branch	Affected	Fixed in	Source
2014.x	= 2014	no fix published	NVD
2015.x	= 2015	no fix published	NVD

Aveva clearscada

Branch	Affected	Fixed in	Source
2010.x	≤ 2010	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-17-068-01 CISA4 known affected
Schneider Electric ClearSCADA
ClearSCADA 2014 R1.1: (build 75.5387) and prior · ClearSCADA 2015 R1: (build 76.5648) and prior · ClearSCADA 2014 R1: (build 75.5210) and prior · +1 more

Full record on NVD

Fix

Vendor fix CISA ICSA-17-068-01 · 4 productsClearSCADA 2015 R2 hotfix build 77.6181
Vendor fix CISA ICSA-17-068-01 · 4 productsUsers of ClearSCADA 2013 R2 and prior versions should upgrade to the latest ClearSCADA 2015 R2 hotfix to mitigate the vulnerability.
Mitigation from the vendor CISA ICSA-17-068-01 · 4 productsClearSCADA 2014 R1.1 hotfix build 75.6239
Mitigation from the vendor CISA ICSA-17-068-01 · 4 productsClearSCADA 2015 R1.1 Service Pack (build 76.6191)
Mitigation from the vendor CISA ICSA-17-068-01 · 4 productsEach of the Service Pack and hotfixes above are available for direct download from Schneider Electric's web site at:
Mitigation from the vendor CISA ICSA-17-068-01 · 4 productsMore information can be found by visiting Schneider Electric's Security Notification at:

Detection

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

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-20read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score1.6 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-05-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-6021?

Is CVE-2017-6021 actively exploited?

Active exploitation of CVE-2017-6021 has not been confirmed. Its EPSS score was 1.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-6021?

CVE-2017-6021 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Running Schneider Electric ClearSCADA? 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