CVE-2021-22674

mediumpriority · track · 26EPSS 0.011 · 65 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.09% (65th) EPSS

CVSS 4 · medium

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

The affected product is vulnerable to a relative path traversal condition, which may allow an attacker access to unauthorized files and directories on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).

remediations

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

No vendor fix yet; a mitigation is available.

MitigationWebAccess/SCADAcisa_csaf_ot
Advantech recommends users running version 8 of the software to update to Version 8.4.5
https://www.advantech.tw/support/details/installation?id=1-MS9MJV

cvss

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

6.5

010

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

v2.04mediumAV:N/AC:L/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · CISA US

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimaryCWE-23USCWE-23US

affected products (7)

Products and version ranges known to be affected.

WebAccess/SCADA: versions prior to 8.4.5all versionscisa_csaf_otUS
WebAccess/SCADA: versions prior to 9.0.1all versionscisa_csaf_otUS
Advantech WebAccess/SCADA< 8.4.5cisa_csaf_otUS
Advantech WebAccess/SCADA< 9.0.1cisa_csaf_otUS
n/a WebAccess/SCADA≤ WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1enisa_euvdEU
advantech webaccess/scada< 8.4.5nvdUScpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:*
advantech webaccess/scada9.0 → 9.0.1nvdUScpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-217-04Advantech WebAccess SCADA2021-08-05icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to hijack a user 's cookie/session tokens, gain unauthorized access to files and directories, and execute arbitrary code.

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 2021-08-10modified 2026-06-17

related (12,536)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-104286US	—OT critical	4.57% (92nd)	KEV	2026-10-01
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A directory traversal and file upload vulnerability allows an unauthenticated attacker to upload and execute arbitrary scripts on Check Point Management Server.
CVE-2026-85706US	—OT critical	97.4% (100th)	KEV	2026-09-12
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.11.12, 19.0 before 19.0.9, 19.1 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2…
CVE-2026-66384US	—OT critical	0.66% (52nd)	KEV	2026-08-12
An authenticated user may write data outside the intended Docker cache path under specific remote-repository conditions.
CVE-2026-59310US	—OT critical	2.56% (85th)	KEV	2026-07-30
VMware vCenter contains a directory traversal vulnerability in the Syslog server. A malicious actor with network access to vCenter may exploit this issue to execute arbitrary code.

+12531 more

references (6)

External citations — patches, advisories, analysis.

https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04 cnnvd
https://www.advantech.com.cn/Patchcnnvd
https://www.auscert.org.au/bulletins/ESB-2021.2656 cnnvd
https://www.cybersecurity-help.cz/vdb/SB2021080606 cnnvd
https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04 enisa_euvd
https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04PatchThird Party AdvisoryUS Government Resourcenvd

scry

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