Denial of Service Vulnerability in aSc TimeTables by aSc
CVE-2020-37109

6.7MEDIUM

Key Information:

Vendor

Asc Applied Software Consultants

Status
Asc Timetables
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-37109?

aSc TimeTables 2020.11.4 is vulnerable to a Denial of Service attack that can be exploited by an attacker through the manipulation of the Subject title field. By inputting an excessively long 1000-character string into this field, the attacker can cause the application to crash, resulting in potential instability and disruption of services. This vulnerability highlights the importance of proper input validation to mitigate the risks associated with buffer overflow attacks.

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Affected Version(s)

aSc TimeTables 2020.11.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-37109 - Proof of Concept

References

https://www.exploit-db.com/exploits/48133
exploit
https://www.asctimetables.com/#!/home
product
https://www.vulncheck.com/advisories/asc-timetables-denia...
third-party-advisory

CVSS V4

Score:
6.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ismael Nava
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