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TI-2021-08925 Aliases CVE-2021-27436GHSA-h79w-h983-cvxf

Cross-site scripting in Advantech WebAccess/SCADA

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

WebAccess/SCADA Versions 9.0 and prior is vulnerable to cross-site scripting, which may allow an attacker to send malicious JavaScript code to an unsuspecting user, which could result in hijacking of the user’s cookie/session tokens, redirecting the user to a malicious webpage and performing unintended browser actions.

Why it matters now

EPSS 0.00714 53rd 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 WebAccess/SCADAup to 9.0—No fix listedCNA
  • Advantech WebAccess/SCADA Vendor— Affected up to 9.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:*up to 9.0VulnerableAdvantech
  • cpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:* Versions up to 9.0 Vulnerable ·Advantech

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27436
  2. 2026-10-03 Alias added: GHSA-h79w-h983-cvxf

References

Advisory 1

  • TI-2023-01357 Memory corruption in Advantech WebAccess/SCADA CVSS 3.1CRITICAL 9.8
  • TI-2019-04573 WebAccess/SCADA, Version 8.3. CVSS 3.0CRITICAL 9.8
  • TI-2021-12552 Stack-based buffer overflow in WebAccess/SCADA CVSS 3.1CRITICAL 9.8
  • TI-2019-04577 WebAccess/SCADA, Version 8.3. CVSS 3.0CRITICAL 9.8
  • TI-2023-15822 Code injection in Advantech WebAccess/SCADA CVSS 3.1CRITICAL 9.8
  • TI-2023-15909 Unrestricted file upload in Advantech WebAccess/SCADA CVSS 3.1CRITICAL 9.8
See all 28 →

Sources

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