CVE-2020-12002

9.8 criticalEPSS 9.1%

Critical (9.8) in advantech webaccess. EPSS 9.1% chance of exploitation in the next 30 days.

Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. Multiple stack-based buffer overflow vulnerabilities exist caused by a lack of proper validation of the length of user-supplied data, which may allow remote code execution.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 9.1% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-31)
CWEs: CWE-787, CWE-121
Published: 2020-05-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

advantech:webaccess

References

https://www.us-cert.gov/ics/advisories/icsa-20-128-01
https://www.zerodayinitiative.com/advisories/ZDI-20-590/
https://www.zerodayinitiative.com/advisories/ZDI-20-591/
https://www.zerodayinitiative.com/advisories/ZDI-20-592/
https://www.zerodayinitiative.com/advisories/ZDI-20-619/

Check your stack JSON