CVE-2026-3631 Buffer Over-read DoS Vulnerability in COMMGR2
A buffer over-read vulnerability in Delta Electronics COMMGR2 allows attackers to cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3631?
CVE-2026-3631 is a high-severity denial of service vulnerability in DeltaWW COMMGR2, published on 9 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Delta Electronics COMMGR2 has
Buffer Over-read DoS vulnerability.
Weakness: CWE-125
Which versions are affected by CVE-2026-3631?
It affects 1 product.
Products include Deltaww Commgr2.
How do I fix CVE-2026-3631?
No fix has been published for CVE-2026-3631 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-3631 being exploited?
There is no known exploitation of CVE-2026-3631 in the wild and no public exploit code.
Other vulnerabilities in DeltaWW COMMGR2
Sources
Also known as GHSA-q5cv-phmc-fwgp.