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Vulnerability record · CVE-2021-43983 · published 13 December 2021

CVE-2021-43983: We-con levistudiou stack-based buffer overflow vulnerability

We Con · Levistudiou

WECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to multiple stack-based buffer overflow instances while parsing project files, which may allow an attacker to execute arbitrary code.

7.8 CVSS 3.1 High EPSS 2.7% · top 14.4% CWE-121 · Stack-based buffer overflowCWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score, v2 6.8
2.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
30References
17 Jun 2026Last modified by NVD

Description

WECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to multiple stack-based buffer overflow instances while parsing project files, which may allow an attacker to execute arbitrary code.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.cisa.gov/uscert/ics/advisories/icsa-21-343-02 Third Party AdvisoryUS Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-22-034/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-035/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-036/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-037/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-038/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-039/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-040/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-041/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-042/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-043/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-044/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-045/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-046/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-047/ Third Party AdvisoryVDB Entry
https://www.cisa.gov/uscert/ics/advisories/icsa-21-343-02 Third Party AdvisoryUS Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-22-034/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-035/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-036/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-037/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-038/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-039/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-040/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-041/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-042/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-043/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-044/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-045/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-046/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-047/ Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2018-10610We-con levistudiou out-of-bounds write vulnerabilityAn out-of-bounds vulnerability in LeviStudioU, Versions 1.8.29 and 1.8.44 can be exploited when the application processes specially crafted project f…EPSS 1.1%8.8CVE-2018-10614We-con levistudiou xml external entity (xxe) vulnerabilityAn XXE vulnerability in LeviStudioU, Versions 1.8.29 and 1.8.44 can be exploited when the application processes specially crafted project XML files.EPSS 1.1%8.8CVE-2018-10602We-con levistudiou stack-based buffer overflow vulnerabilityWECON LeviStudio Versions 1.8.29 and 1.8.44 have multiple stack-based buffer overflow vulnerabilities that can be exploited when the application proc…EPSS 1.9%8.8CVE-2018-10606We-con levistudiou heap-based buffer overflow vulnerabilityWECON LeviStudio Versions 1.8.29 and 1.8.44 have multiple heap-based buffer overflow vulnerabilities that can be exploited when the application proce…EPSS 1.9%7.8CVE-2021-23157We-con levistudiou heap-based buffer overflow vulnerabilityWECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.EPSS 7.6%7.8CVE-2021-23138We-con levistudiou stack-based buffer overflow vulnerabilityWECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute code.EPSS 8.6%7.8CVE-2020-16243We-con levistudiou stack-based buffer overflow vulnerabilityMultiple buffer overflow vulnerabilities exist when LeviStudioU (Version 2019-09-21 and prior) processes project files. Opening a specially crafted p…EPSS 12%7.8CVE-2020-25199We-con levistudiou heap-based buffer overflow vulnerabilityA heap-based buffer overflow vulnerability exists within the WECON LeviStudioU Release Build 2019-09-21 and prior when processing project files. Open…EPSS 1.3%

Source: NIST National Vulnerability Database (record CVE-2021-43983), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.