CVE-2023-2866

HIGHNVD 7.37.3—

7.3

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.

CVSS v3: 7.3
EG Score: 7.3(medium)
EPSS: 6.7%
KEV: Not listed

Published

June 7, 2023

Last Modified

November 21, 2024

References (2)

ics-cert@hqhttps://www.cisa.gov/news-events/ics-advisories/icsa-23-150-01
af854a3a-2127-422b-91ae-364da2661108https://www.cisa.gov/news-events/ics-advisories/icsa-23-150-01

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
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2026-05-26 07:18 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch
2026-05-24 23:48 UTCEG score recompute

Frequently asked(5)

What is CVE-2023-2866?

CVE-2023-2866 is a high vulnerability published on June 7, 2023. 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.

When was CVE-2023-2866 disclosed?

CVE-2023-2866 was first published in the National Vulnerability Database on June 7, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-2866 actively exploited?

CVE-2023-2866 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-2866?

CVE-2023-2866 has a CVSS v3 base score of 7.3 (NVD).

How do I remediate CVE-2023-2866?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-2866, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-2866

📅 Published

🔄 Last Modified

🔗 References (2)