How severe is CVE-2021-43983?

CVE-2021-43983 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43983 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43983?

CVE-2021-43983 affects We-con Levistudiou. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43983?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-43983 published?

CVE-2021-43983 was published on 2021-12-13 and last updated on 2026-06-17.

CVE-2021-43983

CVE-2021-43983 is a high-severity vulnerability in We-con Levistudiou with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: We-con Levistudiou
Published: 2021-12-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-43983?: 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.
How severe is CVE-2021-43983?: CVE-2021-43983 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43983 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43983?: CVE-2021-43983 affects We-con Levistudiou. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43983?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43983 published?: CVE-2021-43983 was published on 2021-12-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:we-con:levistudiou:*:*:*:*:*:*:*:*

More vulnerabilities in We-con Levistudiou

CVE-2018-10614 — High (CVSS 8.8): An XXE vulnerability in LeviStudioU, Versions 1.8.29 and 1.8.44 can be exploited when the application processes…
CVE-2018-10610 — High (CVSS 8.8): An out-of-bounds vulnerability in LeviStudioU, Versions 1.8.29 and 1.8.44 can be exploited when the application…
CVE-2018-10606 — High (CVSS 8.8): WECON LeviStudio Versions 1.8.29 and 1.8.44 have multiple heap-based buffer overflow vulnerabilities that can be…
CVE-2018-10602 — High (CVSS 8.8): WECON LeviStudio Versions 1.8.29 and 1.8.44 have multiple stack-based buffer overflow vulnerabilities that can be…
CVE-2021-23157 — High (CVSS 7.8): WECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to a heap-based buffer overflow, which may allow an…
CVE-2021-23138 — High (CVSS 7.8): WECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to a stack-based buffer overflow, which may allow an…

All CVEs affecting We-con Levistudiou →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →