Stack-based buffer overflow in Advantech WebAccess Node
Priority MEDIUM 54CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. Multiple stack-based buffer overflow vulnerabilities exist caused by a lack of proper validation of the length of user-supplied data, which may allow remote code execution.
Why it matters now
EPSS 0.09076 95th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Advantech WebAccess Node | WebAccess Node Version 8.4.4 and prior, WebAccess Node Version 9.0.0 | — | No fix listed | CNA |
- Advantech WebAccess Node Vendor— Affected WebAccess Node Version 8.4.4 and prior, WebAccess Node Version 9.0.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-12002
- 2026-10-03 Alias added: GHSA-6g8h-c25m-ph57
References
Advisory 10
- https://www.us-cert.gov/ics/advisories/icsa-20-128-01
- https://www.zerodayinitiative.com/advisories/ZDI-20-590/
- https://www.zerodayinitiative.com/advisories/ZDI-20-624/
- https://www.zerodayinitiative.com/advisories/ZDI-20-625/
- https://www.zerodayinitiative.com/advisories/ZDI-20-619/
- https://www.zerodayinitiative.com/advisories/ZDI-20-634/
- https://www.zerodayinitiative.com/advisories/ZDI-20-633/
- https://www.zerodayinitiative.com/advisories/ZDI-20-592/
- https://www.zerodayinitiative.com/advisories/ZDI-20-591/
- https://www.zerodayinitiative.com/advisories/ZDI-20-622/
More Advantech Webaccess vulnerabilities
- TI-2016-00768 Unrestricted file upload vulnerability in the uploadImageCommon function in the… CVSS 3.0CRITICAL 9.8
- TI-2017-12289 Path traversal in Advantech WebAccess CVSS 3.0CRITICAL 9.8
- TI-2016-00771 Multiple heap-based buffer overflows in Advantech WebAccess before 8.1 allow remote… CVSS 3.0CRITICAL 9.8
- TI-2016-00770 Multiple stack-based buffer overflows in Advantech WebAccess before 8.1 allow remote… CVSS 3.0CRITICAL 9.8
- TI-2018-11192 Out-of-bounds write in Advantech WebAccess CVSS 3.0HIGH 8.8
- TI-2021-16012 Stack-based buffer overflow in Advantech WebAccess CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-12002 · CVE Program
- CVE-2020-12002 · NVD
- FIRST EPSS
- GHSA-6g8h-c25m-ph57 · GitHub Advisory Database · CC BY 4.0
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