CVE-2020-37128 ZOC Terminal 7.25.5 - 'Script' Denial of Service
Local attackers can crash ZOC Terminal by loading a maliciously crafted REXX script, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-37128?
CVE-2020-37128 is a medium-severity denial of service vulnerability in EmTec ZOC Terminal, published on 5 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
ZOC Terminal 7.25.5 contains a script processing vulnerability that allows local attackers to crash the application by loading a maliciously crafted REXX script file. Attackers can generate an oversized script with 20,000 repeated characters to trigger an application crash and cause a denial of service.
Weakness: CWE-121
Which versions are affected by CVE-2020-37128?
How do I fix CVE-2020-37128?
No fix has been published for CVE-2020-37128 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-2020-37128 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37128 exists.
Sources
Also known as GHSA-3f26-hjxq-9434.