CVE-2021-38408

9.8 criticalEPSS 12%

Critical (9.8) in advantech webaccess. EPSS 12% chance of exploitation in the next 30 days.

A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data 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: 12% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)
CWE: CWE-121
Published: 2021-09-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

advantech:webaccess

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-245-03
https://us-cert.cisa.gov/ics/advisories/icsa-21-245-03

Check your stack JSON