CVE-2019-6521

highpriority · track · 35OT risk · elevatedEPSS 0.019 · 80 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.93% (80th) EPSS

CVSS 7.5 · high

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-28

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWebAccess/SCADAcisa_csaf_ot
Advantech 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):
https://urldefense.proofpoint.com/v2/url?u=https-3A__support.advantech.com_support_DownloadSRDetail-5FNew.aspx-3FSR-5FID-3D1-2DMS9MJV-26Doc-5FSource-3DDownload&d=DwMFAg&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=bd4G77mdhJayq8hCsaGH3eJ3oTDOURCwn88GATyKPJM&m=uVDoRgrHhHX88anG8A3hRN3SSzs20a5SSAUK4W6QE3g&s=ZzwMLJynAk12jVrLdGX63bHJkGeSBNQZR9c8S5tNViY&e=

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 4.7

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Lsecondary · CISA US

v3.07.9highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimaryCWE-288US

affected products (4)

Products and version ranges known to be affected.

WebAccess/SCADA: Version 8.3all versionscisa_csaf_otUS
Advantech WebAccess/SCADAall versionscisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
advantech webaccess/scada= 8.3nvdUScpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-19-024-01Advantech WebAccess/SCADA2019-01-24icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities may allow an attacker to access and manipulate sensitive data.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2019-02-05modified 2026-06-17

related (7,724)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-105133US	high7.3OT critical	79.5% (100th)	KEV	2026-10-04
A vulnerability was detected in Ahsay AhsayCBS up to 9.15.2.69/10.3.4.44. This affects the function checkSysPwd of the file com/ahsay/obs/api/ApiStructsAction.java of the component…
CVE-2026-82329US	—OT critical	14.4% (97th)	KEV	2026-08-28
JFrog Artifactory contains an authentication weakness that, under default configuration, may allow an unauthenticated attacker with network access to obtain administrative privileg…
CVE-2026-42018US	—OT critical	9.80% (96th)	KEV	2026-08-12
JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
CVE-2026-65400US	—OT critical	1.72% (77th)	KEV	2026-08-06
An authentication issue was addressed with improved state management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1, ma…
CVE-2026-16232US	critical9.8OT critical	3.52% (89th)	KEV	2026-07-22
An authentication bypass vulnerability in the Check Point SmartConsole login process allows an unauthenticated remote attacker to obtain an application login token and use it to au…

+7719 more

references (10)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan