CVE-2020-36943

HIGH

asc Timetables 2021.6.2 - Denial of Service via Subject Title Field Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-36943. PoCs published by Ismael Nava.

AI-analyzed exploit summary This exploit demonstrates a Denial of Service (DoS) vulnerability in aSc TimeTables 2021.6.2 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 2021.6.2 contains a denial of service vulnerability that allows attackers to crash the application by overwriting subject title fields with excessive data. Attackers can generate a 10,000-character buffer and paste it into the subject title to trigger application instability and potential crash.

Exploits (1)

exploitdb WORKING POC
by Ismael Nava · textlocalwindows
https://www.exploit-db.com/exploits/49147

This exploit demonstrates a Denial of Service (DoS) vulnerability in aSc TimeTables 2021.6.2 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 2021.6.2
No auth needed
Prerequisites: aSc TimeTables 2021.6.2 installed on Windows · ability to create and paste a text file into the application
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Various Sources product
https://www.asctimetables.com/#!/home
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/49147

Scores

CVSS v3 7.5
EPSS 0.0025
EPSS Percentile 15.7%
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-770
Status published
Products (1)
asc Applied Software Consultants, s.r.o./asc Timetables 2021.6.2
Published Jan 28, 2026
Tracked Since Feb 18, 2026