Stack-based buffer overflow in WECON LeviStudioU
Priority MEDIUM 47CWE-121Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
WECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute code.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.08595 95th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WECON | LeviStudioU | All – 2019-09-21 | — | No fix listed | CNA |
- LeviStudioU VendorWECON Affected All – 2019-09-21 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:we-con:levistudiou:*:*:*:*:*:*:*:* | up to 2019-09-21 | Vulnerable | WECON Technology Co., Ltd. |
- cpe:2.3:a:we-con:levistudiou:*:*:*:*:*:*:*:* Versions up to 2019-09-21 Vulnerable ·WECON Technology Co., Ltd.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-23138
- 2026-10-03 Alias added: GHSA-rvhx-r576-jx25
- 2026-10-14 EPSS moved to the 95th–99th percentile
References
Advisory 13
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-355-03
- https://www.zerodayinitiative.com/advisories/ZDI-22-133/
- https://www.zerodayinitiative.com/advisories/ZDI-22-139/
- https://www.zerodayinitiative.com/advisories/ZDI-22-134/
- https://www.zerodayinitiative.com/advisories/ZDI-22-136/
- https://www.zerodayinitiative.com/advisories/ZDI-22-138/
- https://www.zerodayinitiative.com/advisories/ZDI-22-141/
- https://www.zerodayinitiative.com/advisories/ZDI-22-137/
- https://www.zerodayinitiative.com/advisories/ZDI-22-131/
- https://www.zerodayinitiative.com/advisories/ZDI-22-135/
- https://www.zerodayinitiative.com/advisories/ZDI-22-142/
- https://www.zerodayinitiative.com/advisories/ZDI-22-129/
- https://www.zerodayinitiative.com/advisories/ZDI-22-140/
More WECON vulnerabilities
- TI-2016-05016 Stack-based buffer overflow in WECON LeviStudio allows remote attackers to execute arbitrary code via a crafted file. CVSS 3.0HIGH 7.8
- TI-2018-10648 Stack-based buffer overflow in WECON PI Studio HMI CVSS 3.1CRITICAL 9.8
- TI-2016-03902 Heap-based buffer overflow in WECON LeviStudio allows remote attackers to execute arbitrary code via a crafted file. CVSS 3.1HIGH 7.8
- TI-2021-05938 Heap-based buffer overflow in WECON LeviStudioU CVSS 3.1HIGH 7.8
- TI-2018-10640 Out-of-bounds write in WECON PI Studio HMI CVSS 3.0HIGH 8.8
- TI-2021-19739 Stack-based buffer overflow in WECON LeviStudioU CVSS 3.1HIGH 7.8
Sources
- CVE-2021-23138 · CVE Program
- CVE-2021-23138 · NVD
- FIRST EPSS
- GHSA-rvhx-r576-jx25 · GitHub Advisory Database · CC BY 4.0
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