How severe is CVE-2023-2866?

CVE-2023-2866 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-2866 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-2866?

CVE-2023-2866 affects Advantech Webaccess. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-2866?

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-2023-2866 published?

CVE-2023-2866 was published on 2023-06-07 and last updated on 2026-06-17.

CVE-2023-2866

CVE-2023-2866 is a high-severity vulnerability in Advantech Webaccess with a CVSS 3.x base score of 7.3. 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-345.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Advantech Webaccess
Published: 2023-06-07
Last modified: 2026-06-17

Description

If an attacker can trick an authenticated user into loading a maliciously crafted .zip file onto Advantech WebAccess version 8.4.5, a web shell could be used to give the attacker full control of the SCADA server.

Frequently asked questions

What is CVE-2023-2866?: If an attacker can trick an authenticated user into loading a maliciously crafted .zip file onto Advantech WebAccess version 8.4.5, a web shell could be used to give the attacker full control of the SCADA server.
How severe is CVE-2023-2866?: CVE-2023-2866 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-2866 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-2866?: CVE-2023-2866 affects Advantech Webaccess. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-2866?: 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-2023-2866 published?: CVE-2023-2866 was published on 2023-06-07 and last updated on 2026-06-17.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-23-150-01

Affected products (1)

cpe:2.3:a:advantech:webaccess:8.4.5:*:*:*:*:*:*:*

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