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TI-2021-16012 Aliases CVE-2021-38408GHSA-pc3j-ph7x-cxh4

Stack-based buffer overflow in Advantech WebAccess

Priority MEDIUM 56CWE-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

A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data may allow remote code execution.

Why it matters now

EPSS 0.11569 96th 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

VendorProductAffected versionsFixed inStatusSource
—Advantech WebAccessWebAccess: Versions 9.02 and prior—No fix listedCNA
  • Advantech WebAccess Vendor— Affected WebAccess: Versions 9.02 and prior Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*up to 9.02VulnerableAdvantech
  • cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:* Versions up to 9.02 Vulnerable ·Advantech

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-38408
  2. 2026-10-03 Alias added: GHSA-pc3j-ph7x-cxh4

References

Advisory 1

  • 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-2018-05047 The VBWinExec function in Node\AspVBObj.dll in Advantech WebAccess 8.3.0 allows remote… CVSS 3.0CRITICAL 9.8
See all 102 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences