CVE-2021-33023

9.8 criticalEPSS 2.3%

Critical (9.8) in advantech webaccess. EPSS 2.3% chance of exploitation in the next 30 days.

Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.

Severity

9.8 critical

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

EPSS: 2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
CWEs: CWE-787, CWE-122
Published: 2021-10-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19