CVE-2020-37109Public exploit

Application crash via oversized Subject title

Published Feb 6, 2026 · Updated Feb 6, 2026

Buffer overflow in aSc TimeTables 2020.11.4 allows local users to crash the application by entering an oversized Subject title. The Subject creation dialog accepts a 1,000-character title and copies it without enforcing the destination buffer's size. Exploitation requires interactive access to create a timetable and paste the generated text; the demonstrated consequence is an application crash.

CVSS severity6.7
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in aSc TimeTables 2020.11.4 allows local users to crash the application by entering an oversized Subject title. The Subject creation dialog accepts a 1,000-character title and copies it without enforcing the destination buffer's size. Exploitation requires interactive access to create a timetable and paste the generated text; the demonstrated consequence is an application crash.

The record

CVE
CVE-2020-37109
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
asc Applied Software Consultants, s.r.o.
Product
aSc TimeTables
Classifications
CWE-120
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=2020.11.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

asc Applied Software Consultants, s.r.o. · aSc TimeTablesversion=2020.11.4

Published CVSS scores

6.7VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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Technologies

Your stack

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Your stack

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