What is CVE-2021-43982?

CVE-2021-43982 is a high-severity vulnerability in Delta Electronics Cncsoft, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2021-12-09.

How severe is CVE-2021-43982?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Delta Electronics Cncsoft

CVE-2021-43982

Delta Electronics CNCSoft Versions 1.01.30 and prior are vulnerable to a stack-based buffer overflow, which may allow an attacker to execute arbitrary code.

Vulnerability class: Buffer Overflow

Published 2021-12-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.096 (95.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.096 · newest: 0.096 · change: 0.000

Affected products

Delta Electronics Cncsoft — versions All
Deltaww Cncsoft

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

www.cisa.gov/uscert/ics/advisories/icsa-21-334-03 (US Government Resource, Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2021-43982?: CVE-2021-43982 is a high-severity vulnerability in Delta Electronics Cncsoft, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2021-12-09.
How severe is CVE-2021-43982?: High severity. CVSS v3 base score is 7.8 out of 10.