What is CVE-2021-22656?

CVE-2021-22656 is a high-severity vulnerability in Advantech Iview, classified under Path Traversal. CVSS score: 7.5/10. Published 2021-02-11.

How severe is CVE-2021-22656?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Advantech Iview

CVE-2021-22656

Advantech iView versions prior to v5.7.03.6112 are vulnerable to directory traversal, which may allow an attacker to read sensitive files.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2021-02-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.032 (87.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.032 · change: +0.001

Affected products

Advantech Iview
Advantech Iview — versions iView versions prior to v5.7.03.6112

Weakness classification (CWE)

CWE-22 — Path Traversal

References

us-cert.cisa.gov/ics/advisories/icsa-21-040-02 (US Government Resource, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-21-189/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-22656?: CVE-2021-22656 is a high-severity vulnerability in Advantech Iview, classified under Path Traversal. CVSS score: 7.5/10. Published 2021-02-11.
How severe is CVE-2021-22656?: High severity. CVSS v3 base score is 7.5 out of 10.