CVE-2026-1952 Denial of service via the undocumented subfunction in AS320T

Critical 9.8 Published 24 Apr 2026 Updated 24 Apr 2026

Attackers can cause a denial of service on Delta AS320T devices by exploiting an undocumented subfunction.

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-2026-1952?

CVE-2026-1952 is a critical denial of service vulnerability in DeltaWW AS320T, published on 24 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Delta Electronics AS320T has denial of service via the undocumented subfunction vulnerability.

Weakness: CWE-912

Which versions are affected by CVE-2026-1952?

It affects 1 product.

Products include Deltaww As320t Firmware.

How do I fix CVE-2026-1952?

No fix has been published for CVE-2026-1952 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-2026-1952 being exploited?

There is no known exploitation of CVE-2026-1952 in the wild and no public exploit code.

Sources

Also known as GHSA-598w-79v9-4m2g.