How severe is CVE-2020-12018?

CVE-2020-12018 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-12018 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12018?

CVE-2020-12018 primarily affects Advantech Webaccess. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12018?

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-2020-12018 published?

CVE-2020-12018 was published on 2020-05-08 and last updated on 2026-06-17.

CVE-2020-12018

CVE-2020-12018 is a high-severity vulnerability in Advantech Webaccess with a CVSS 3.x base score of 7.5. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Advantech Webaccess
Published: 2020-05-08
Last modified: 2026-06-17

Description

Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. An out-of-bounds vulnerability exists that may allow access to unauthorized data.

Frequently asked questions

What is CVE-2020-12018?: Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. An out-of-bounds vulnerability exists that may allow access to unauthorized data.
How severe is CVE-2020-12018?: CVE-2020-12018 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-12018 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12018?: CVE-2020-12018 primarily affects Advantech Webaccess. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12018?: 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-2020-12018 published?: CVE-2020-12018 was published on 2020-05-08 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*
cpe:2.3:a:advantech:webaccess:9.0.0:*:*:*:*:*:*:*

More vulnerabilities in Advantech Webaccess

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CVE-2020-12022 — Critical (CVSS 9.8): Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. An improper validation vulnerability exists that…

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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