What is CVE-2021-32951?

CVE-2021-32951 is a medium-severity vulnerability in Advantech Webaccess/nms, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-10-27.

How severe is CVE-2021-32951?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Advantech Webaccess/nms

CVE-2021-32951

WebAccess/NMS (Versions prior to v3.0.3_Build6299) has an improper authentication vulnerability, which may allow unauthorized users to view resources monitored and controlled by the WebAccess/NMS, as well as IP addresses and names of all the devices managed via WebAccess/NMS.

Vulnerability class: Broken Authentication

Published 2021-10-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Advantech Webaccess/nms — versions Versions
Advantech Webaccess\/nms

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

us-cert.cisa.gov/ics/advisories/icsa-21-229-02 (US Government Resource, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-32951?: CVE-2021-32951 is a medium-severity vulnerability in Advantech Webaccess/nms, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-10-27.
How severe is CVE-2021-32951?: Medium severity. CVSS v3 base score is 5.3 out of 10.