How severe is CVE-2020-13555?

CVE-2020-13555 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-13555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13555?

CVE-2020-13555 affects Advantech Webaccess/scada. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13555?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-13555 published?

CVE-2020-13555 was published on 2021-02-17 and last updated on 2026-06-17.

CVE-2020-13555

CVE-2020-13555 is a high-severity vulnerability in Advantech Webaccess/scada with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-276.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Advantech Webaccess/scada
Published: 2021-02-17
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2020-13555?: An exploitable local privilege elevation vulnerability exists in the file system permissions of Advantech WebAccess/SCADA 9.0.1 installation. In COM Server Application Privilege Escalation, an attacker can either replace binary or loaded modules to execute code with NT SYSTEM privilege.
How severe is CVE-2020-13555?: CVE-2020-13555 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-13555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13555?: CVE-2020-13555 affects Advantech Webaccess/scada. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-13555 published?: CVE-2020-13555 was published on 2021-02-17 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1169

Affected products (1)

cpe:2.3:a:advantech:webaccess\/scada:9.0.1:*:*:*:*:*:*:*

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