CVE-2021-22658Network attack vector

Administrator escalation via unvalidated UserServlet query

Published Feb 11, 2021 · Updated Aug 3, 2024

SQL injection in Advantech iView before 5.7.03.6112 allows remote authenticated users to gain Administrator access via a crafted request. The UserServlet class uses an insufficiently validated user-supplied string to construct SQL queries, enabling an Admin password reset. Authentication is required, but the existing authentication mechanism can be bypassed; successful exploitation grants administrative control.

CVSS severity8.8
High
EPSS probability12.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Advantech iView before 5.7.03.6112 allows remote authenticated users to gain Administrator access via a crafted request. The UserServlet class uses an insufficiently validated user-supplied string to construct SQL queries, enabling an Admin password reset. Authentication is required, but the existing authentication mechanism can be bypassed; successful exploitation grants administrative control.

The record

CVE
CVE-2021-22658
Published
Feb 11, 2021
Updated
Aug 3, 2024
Vendor
Advantech
Product
iView
Classifications
CWE-89, T1098, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 11, 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=iView versions prior to v5.7.03.6112

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Advantech · iViewversion=iView versions prior to v5.7.03.6112

Published CVSS scores

8.8CISACVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1098Account Manipulation
T1190Exploit Public-Facing Application

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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