CVE-2020-37109 aSc TimeTables 2020.11.4 - Denial of Service
Attackers can crash the aSc TimeTables application by pasting a large buffer into the Subject title field, 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-2020-37109?
CVE-2020-37109 is a medium-severity denial of service vulnerability in aSc TimeTables, published on 6 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
aSc TimeTables 2020.11.4 contains a denial of service vulnerability that allows attackers to crash the application by overwriting the Subject title field with a large buffer. Attackers can generate a 1000-character buffer and paste it into the Subject title to trigger an application crash and potential instability.
Weakness: CWE-120
Which versions are affected by CVE-2020-37109?
How do I fix CVE-2020-37109?
No fix has been published for CVE-2020-37109 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-2020-37109 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37109 exists.
Sources
Also known as GHSA-f2rx-xqg7-mqcx.