What’s Vulnerable › Vulnerabilities

CVE-2021-32943

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-10 · updated 2026-06-17
• Weakness: CWE-121

Description

The affected product is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).

Affected products

• Advantech Webaccess/Scada: before 8.4.5; from 9.0 before 9.0.1 — fixed in 8.4.5, 9.0.1

How to fix

Upgrade to a fixed version: Advantech Webaccess/Scada 8.4.5, 9.0.1. Check the vendor advisory for mitigations.

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04
• https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04

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