What is CVE-2021-27480?

CVE-2021-27480 is a critical-severity vulnerability in Deltaww Industrial Automation Commgr, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2021-04-27.

How severe is CVE-2021-27480?

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

Buffer overflow in Deltaww Industrial Automation Commgr

CVE-2021-27480

Delta Industrial Automation COMMGR Versions 1.12 and prior are vulnerable to a stack-based buffer overflow, which may allow an attacker to execute remote code.

Vulnerability class: Buffer Overflow

Published 2021-04-27 · 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: 0.013 (68.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Deltaww Industrial Automation Commgr
Delta Industrial Automation Commgr — versions COMMGR: Version 1.12 and prior

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

us-cert.cisa.gov/ics/advisories/icsa-21-110-03 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2021-27480?: CVE-2021-27480 is a critical-severity vulnerability in Deltaww Industrial Automation Commgr, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2021-04-27.
How severe is CVE-2021-27480?: Critical severity. CVSS v3 base score is 9.8 out of 10.