CVE-2020-37109

HIGH

aSc TimeTables 2020.11.4 - Denial of Service via Subject Title Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-37109. PoCs published by Ismael Nava.

AI-analyzed exploit summary This exploit demonstrates a Denial of Service (DoS) vulnerability in aSc TimeTables 2020.11.4 by overwriting a text file with a large buffer of 'Z' characters, which crashes the application when pasted into the 'Subject title' field.

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.

Exploits (1)

exploitdb WORKING POC
by Ismael Nava · pythondoswindows
https://www.exploit-db.com/exploits/48133

This exploit demonstrates a Denial of Service (DoS) vulnerability in aSc TimeTables 2020.11.4 by overwriting a text file with a large buffer of 'Z' characters, which crashes the application when pasted into the 'Subject title' field.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: aSc TimeTables 2020.11.4
No auth needed
Prerequisites: aSc TimeTables 2020.11.4 installed on Windows · ability to create and paste content into the application
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/48133
Various Sources product
https://www.asctimetables.com/#!/home

Scores

CVSS v3 7.5
EPSS 0.0036
EPSS Percentile 27.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (1)
asc Applied Software Consultants/aSc TimeTables 2020.11.4
Published Feb 07, 2026
Tracked Since Feb 18, 2026