What is CVE-2020-37109?

CVE-2020-37109 is a high-severity vulnerability in Asc Applied Software Consultants Timetables, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-02-07.

How severe is CVE-2020-37109?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Asc Applied Software Consultants Timetables

CVE-2020-37109

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.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (28.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Asc Applied Software Consultants Timetables — versions 2020.11.4

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2020-37109?: CVE-2020-37109 is a high-severity vulnerability in Asc Applied Software Consultants Timetables, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-02-07.
How severe is CVE-2020-37109?: High severity. CVSS v3 base score is 7.5 out of 10.