Out-of-bounds Read in Deltaww Commgr2

CVE-2026-3631

Delta Electronics COMMGR2 has Buffer Over-read DoS vulnerability.

Vulnerability class: Buffer Overflow

Published · last modified .

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:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-3631: held from 0.009 to 0.005.

EPSS over last 30 days · oldest: 0.009 · newest: 0.005 · change: -0.004

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-3631?
CVE-2026-3631 is a high-severity vulnerability in Deltaww Commgr2, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-03-09.
How severe is CVE-2026-3631?
High severity. CVSS v3 base score is 7.5 out of 10.