What is CVE-2020-10631?

CVE-2020-10631 is a critical-severity vulnerability in Advantech Webaccess\/nms, classified under Relative Path Traversal. CVSS score: 9.8/10. Published 2020-04-09.

How severe is CVE-2020-10631?

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

Path Traversal in Advantech Webaccess\/nms

CVE-2020-10631

An attacker could use a specially crafted URL to delete or read files outside the WebAccess/NMS's (versions prior to 3.0.2) control.

Published 2020-04-09 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.015 (73.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Advantech Webaccess\/nms
Webaccess/nms — versions Versions prior to 3.0.2

Weakness classification (CWE)

References

www.us-cert.gov/ics/advisories/icsa-20-098-01 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2020-10631?: CVE-2020-10631 is a critical-severity vulnerability in Advantech Webaccess\/nms, classified under Relative Path Traversal. CVSS score: 9.8/10. Published 2020-04-09.
How severe is CVE-2020-10631?: Critical severity. CVSS v3 base score is 9.8 out of 10.