What is CVE-2021-33023?

CVE-2021-33023 is a critical-severity vulnerability in Advantech Webaccess, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2021-10-18.

How severe is CVE-2021-33023?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Advantech Webaccess

CVE-2021-33023

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

Vulnerability class: Buffer Overflow

EPSS: 0.009 (76.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Advantech Webaccess — versions All

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

us-cert.cisa.gov/ics/advisories/icsa-21-285-02 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-33023?: CVE-2021-33023 is a critical-severity vulnerability in Advantech Webaccess, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2021-10-18.
How severe is CVE-2021-33023?: Critical severity. CVSS v3 base score is 9.8 out of 10.