CVE-2019-6550

CRITICALNVD 9.89.8—

9.8

Advantech WebAccess/SCADA, Versions 8.3.5 and prior. Multiple stack-based buffer overflow vulnerabilities, caused by a lack of proper validation of the length of user-supplied data, may allow remote code execution.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 87.8%
KEV: Not listed

Published

April 5, 2019

Last Modified

November 21, 2024

References (4)

ics-cert@hqhttps://ics-cert.us-cert.gov/advisories/ICSA-19-092-01
ics-cert@hqhttps://www.zerodayinitiative.com/advisories/ZDI-19-585/
af854a3a-2127-422b-91ae-364da2661108https://ics-cert.us-cert.gov/advisories/ICSA-19-092-01
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-19-585/

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 19× 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 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 20:54 UTCEG score recompute
2026-05-27 20:54 UTCGHSA enrichment
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:47 UTCepss_batch
2026-05-23 04:09 UTCOSV refresh

Frequently asked(5)

What is CVE-2019-6550?

CVE-2019-6550 is a critical vulnerability published on April 5, 2019. Advantech WebAccess/SCADA, Versions 8.3.5 and prior. Multiple stack-based buffer overflow vulnerabilities, caused by a lack of proper validation of the length of user-supplied data, may allow remote code execution.

When was CVE-2019-6550 disclosed?

CVE-2019-6550 was first published in the National Vulnerability Database on April 5, 2019, 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-2019-6550 actively exploited?

CVE-2019-6550 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-6550?

CVE-2019-6550 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2019-6550?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-6550, 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.

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CVE-2019-6550

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-6550?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)