Critical severity · published Mar 9, 2026
CVE-2026-3630
Stack-based Buffer Overflow Vulnerability in COMMGR2
9.8
CVSS
1%
EPSS
No
On KEV
Description
Delta Electronics COMMGR2 has
Stack-based Buffer Overflow vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
COMMGR2 · DeltaWW
through 2.11.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3630
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3630
Vendor Advisory
https://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2026-00005_COMMGR%202%20Multiple%20Vulnerabilities%20(CVE-2026-3630,%20CVE-2026-3631).pdf
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