CVE-2020-13552Public exploit

SYSTEM code execution via writable service binaries

Published Feb 17, 2021 · Updated Aug 4, 2024

Privilege escalation in Advantech WebAccess/SCADA 9.0.1 allows local users to execute code as NT AUTHORITY\SYSTEM. The installer grants Authenticated Users change access to multiple service executables and module locations, including SaaS Composer, MongoDB, Dashboard, and InfluxDB paths. A low-privileged account can replace a service binary or loaded module, which executes when the privileged service loads it.

CVSS severity8.8
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Advantech WebAccess/SCADA 9.0.1 allows local users to execute code as NT AUTHORITY\SYSTEM. The installer grants Authenticated Users change access to multiple service executables and module locations, including SaaS Composer, MongoDB, Dashboard, and InfluxDB paths. A low-privileged account can replace a service binary or loaded module, which executes when the privileged service loads it.

The record

CVE
CVE-2020-13552
Published
Feb 17, 2021
Updated
Aug 4, 2024
Vendor
Advantech
Product
WebAccess/SCADA
Classifications
CWE-276, T1574.010
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=Advantech WebAccess/SCADA 9.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Advantech · WebAccess/SCADAversion=Advantech WebAccess/SCADA 9.0.1

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
8.8Cisco TalosCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

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No observations available

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

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1574.010Hijack Execution Flow: Services File Permissions Weakness

Public exploit references

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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