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TI-2021-12630 Aliases CVE-2021-33023GHSA-qw3w-g5fj-98wc

Heap-based buffer overflow in Advantech WebAccess

Priority MEDIUM 47CWE-122Published · 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 · CNA. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.

Why it matters now

EPSS 0.02346 83rd 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
AdvantechWebAccessAll – 9.02—No fix listedCNA
  • WebAccess VendorAdvantech Affected All – 9.02 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*up to 9.0.2VulnerableAdvantech
  • cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:* Versions up to 9.0.2 Vulnerable ·Advantech

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33023
  2. 2026-10-03 Alias added: GHSA-qw3w-g5fj-98wc

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-2021-16012 Stack-based buffer overflow in Advantech WebAccess CVSS 3.1CRITICAL 9.8
See all 102 →

Sources

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