CVE-2021-43983
No exploitation reported by the sources we read.
- Published2021-12-13
- WeaknessCWE-121 · CWE-787
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2021-12-1316:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-43983?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-43983?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2019.x | ≤ 2019-09-21 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
WECON LeviStudioU
LeviStudioU - LeviStudioU: Versions 2019-09-21 and prior
Fix
- Mitigation from the vendor CISA ICSA-21-343-02 · 1 productOnly use project files from trusted sources.
- Mitigation from the vendor CISA ICSA-21-343-02 · 1 productDo not click web links or open unsolicited attachments in email messages.
- Mitigation from the vendor CISA ICSA-21-343-02 · 1 productRefer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
- Mitigation from the vendor CISA ICSA-21-343-02 · 1 productRefer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2021-12-13
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-43983?
Is CVE-2021-43983 actively exploited?
What is the CVSS score for CVE-2021-43983?
Running WECON LeviStudioU? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.