CVE-2020-36994 QlikView 12.50.20000.0 - 'FTP Server Address' Denial of Service
Local attackers can crash QlikView by pasting a long string into the FTP server address field, disrupting application availability.
- 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-2020-36994?
CVE-2020-36994 is a medium-severity denial of service vulnerability in QlikTech International AB QlikView, published on 29 Jan 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
QlikView 12.50.20000.0 contains a denial of service vulnerability in the FTP server address input field that allows local attackers to crash the application. Attackers can paste a 300-character buffer into the FTP server address field to trigger an application crash and prevent normal functionality.
Weakness: CWE-120
Which versions are affected by CVE-2020-36994?
How do I fix CVE-2020-36994?
No fix has been published for CVE-2020-36994 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-2020-36994 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36994 exists.
Sources
Also known as GHSA-wjqm-4cvj-wx2q.