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TI-2021-18903 Aliases CVE-2021-42683GHSA-pf63-23gc-pj5p

A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v…

Priority LOW 39CWE-120Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
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-120 and the CVSS impact.

Summary

A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22001B allows local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.

Why it matters now

EPSS 0.00478 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:accops:hyworks_windows_client:*:*:*:*:*:*:*:*before 3.2.8.200VulnerableAccops
  • cpe:2.3:a:accops:hyworks_windows_client:*:*:*:*:*:*:*:* Versions before 3.2.8.200 Vulnerable ·Accops

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42683
  2. 2026-10-03 Alias added: GHSA-pf63-23gc-pj5p

References

Exploit 1

  • TI-2021-18907 An Integer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v… CVSS 3.1HIGH 8.8
  • TI-2021-18906 A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v… CVSS 3.1HIGH 8.8
  • TI-2021-18905 An Integer Overflow exists in Accops HyWorks Windows Client prior to v 3.2.8.200. CVSS 3.1HIGH 8.8

Sources

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