What is CVE-2021-43986?

CVE-2021-43986 is a medium-severity vulnerability in Fanuc Roboguide, classified under Improper Access Control. CVSS score: 6.0/10. Published 2022-04-20.

How severe is CVE-2021-43986?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Fanuc Roboguide

CVE-2021-43986

The setup program for the affected product configures its files and folders with full access, which may allow unauthorized users permission to replace original binaries and achieve privilege escalation.

Published 2022-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (5.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Fanuc Roboguide — versions All

Weakness classification (CWE)

References

www.cisa.gov/uscert/ics/advisories/icsa-22-109-03 (US Government Resource, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43986?: CVE-2021-43986 is a medium-severity vulnerability in Fanuc Roboguide, classified under Improper Access Control. CVSS score: 6.0/10. Published 2022-04-20.
How severe is CVE-2021-43986?: Medium severity. CVSS v3 base score is 6.0 out of 10.