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Vulnerability record · CVE-2020-13554 · published 3 March 2021

CVE-2020-13554: Advantech webaccess\/scada incorrect default permissions vulnerability

Advantech · Webaccess\/Scada

An exploitable local privilege elevation vulnerability exists in the file system permissions of Advantech WebAccess/SCADA 9.0.1 installation. In webvrpcs Run Key Privilege Escalation in installation folder of WebAccess, an attacker can either replace binary or loaded modules to execute code with NT SYSTEM privilege.

7.8 CVSS 3.1 High EPSS 0.55% · top 56.3% CWE-276 · Incorrect default permissions
7.8CVSS 3.1 base score, v2 7.2
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An exploitable local privilege elevation vulnerability exists in the file system permissions of Advantech WebAccess/SCADA 9.0.1 installation. In webvrpcs Run Key Privilege Escalation in installation folder of WebAccess, an attacker can either replace binary or loaded modules to execute code with NT SYSTEM privilege.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1169 ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1169 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-1437Advantech webaccess\/scada memory buffer overflow vulnerabilityAll versions prior to 9.1.4 of Advantech WebAccess/SCADA are vulnerable to use of untrusted pointers. The RPC arguments the client sent could contain…EPSS 2.8%9.8CVE-2023-32628Advantech webaccess\/scada unrestricted file upload vulnerabilityIn Advantech WebAccss/SCADA v9.1.3 and prior, there is an arbitrary file upload vulnerability that could allow an attacker to modify the file extensi…EPSS 0.71%9.8CVE-2023-32540Advantech webaccess\/scada code injection vulnerabilityIn Advantech WebAccss/SCADA v9.1.3 and prior, there is an arbitrary file overwrite vulnerability, which could allow an attacker to overwrite any file…EPSS 0.90%9.8CVE-2021-32943Advantech webaccess\/scada stack-based buffer overflow vulnerabilityThe affected product is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code on the WebAccess/…EPSS 1.9%9.8CVE-2019-6523Advantech webaccess\/scada sql injection vulnerabilityWebAccess/SCADA, Version 8.3. The software does not properly sanitize its inputs for SQL commands.EPSS 2.0%9.8CVE-2019-6519Advantech webaccess\/scada improper authentication vulnerabilityWebAccess/SCADA, Version 8.3. An improper authentication vulnerability exists that could allow a possible authentication bypass allowing an attacker …EPSS 2.8%8.8CVE-2021-22669Advantech webaccess\/scada incorrect permission assignment vulnerabilityIncorrect permissions are set to default on the ‘Project Management’ page of WebAccess/SCADA portal of WebAccess/SCADA Versions 9.0.1 and prior, whic…EPSS 1.2%8.8CVE-2020-25161Advantech webaccess\/scada vulnerabilityThe WADashboard component of WebAccess/SCADA Versions 9.0 and prior may allow an attacker to control or influence a path used in an operation on the …EPSS 1.6%

Source: NIST National Vulnerability Database (record CVE-2020-13554), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.