No exploitation reportedFix available

CVE-2019-6521

No exploitation reported by the sources we read.

Published2019-02-05
WeaknessCWE-287

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

WebAccess/SCADA, Version 8.3. Specially crafted requests could allow a possible authentication bypass that could allow an attacker to obtain and manipulate sensitive information.

Timeline

dates in UTC

2019-02-0521:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2019-6521?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-6521?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Advantech webaccess\/scada

Branch	Affected	Fixed in	Source
8.3	= 8.3	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-19-024-01 CISA1 known affected
Advantech WebAccess/SCADA
WebAccess/SCADA: Version 8.3

Full record on NVD

Fix

Vendor fix CISA ICSA-19-024-01 · 1 productAdvantech has released Version 8.3.5 of WebAccess/SCADA to address the reported vulnerabilities. Users can download the latest version of WebAccess/SCADA at the following location (registration required):

Detection

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

Sources

NVDCVSS 3.08.6read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-287read 2026-10-23
FIRST EPSSEPSS score1.9 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Published: 2019-02-05
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-6521?

WebAccess/SCADA, Version 8.3. Specially crafted requests could allow a possible authentication bypass that could allow an attacker to obtain and manipulate sensitive information.

Is CVE-2019-6521 actively exploited?

Active exploitation of CVE-2019-6521 has not been confirmed. Its EPSS score was 1.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-6521?

CVE-2019-6521 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.

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