CVE-2021-22669Network attack vector

Administrator takeover via exposed password update

Published Apr 26, 2021 · Updated Aug 3, 2024

Incorrect permission assignment in Advantech WebAccess/SCADA 9.0.1 and earlier allows remote authenticated users to gain administrator access. The Project Management page exposes its administrator-password update operation to low-privileged accounts because of its default permission assignment. A valid low-privileged portal account is required; the changed credentials permit administrator login and full control of the SCADA system.

CVSS severity8.8
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect permission assignment in Advantech WebAccess/SCADA 9.0.1 and earlier allows remote authenticated users to gain administrator access. The Project Management page exposes its administrator-password update operation to low-privileged accounts because of its default permission assignment. A valid low-privileged portal account is required; the changed credentials permit administrator login and full control of the SCADA system.

The record

CVE
CVE-2021-22669
Published
Apr 26, 2021
Updated
Aug 3, 2024
Vendor
Advantech
Product
WebAccess/SCADA
Classifications
CWE-732, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=WebAccess/SCADA Versions 9.0.1 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Advantech · WebAccess/SCADAversion=WebAccess/SCADA Versions 9.0.1 and prior

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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