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TI-2021-04866 Aliases CVE-2021-21821GHSA-cmvh-8j78-w9jq

Stack-based buffer overflow in Accusoft

Priority MEDIUM 46CWE-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 exists in the PDF process_fontname functionality of Accusoft ImageGear 19.9. A specially crafted malformed file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Why it matters now

EPSS 0.01963 80th 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
—AccusoftAccusoft ImageGear 19.9—No fix listedCNA
  • Accusoft Vendor— Affected Accusoft ImageGear 19.9 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:accusoft:imagegear:19.9:*:*:*:*:*:*:*19.9VulnerableAccusoft
  • cpe:2.3:a:accusoft:imagegear:19.9:*:*:*:*:*:*:* Versions 19.9 Vulnerable ·Accusoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21821
  2. 2026-10-03 Alias added: GHSA-cmvh-8j78-w9jq

References

Exploit 1

  • TI-2023-21037 Out-of-bounds write in Accusoft ImageGear CVSS 3.1CRITICAL 9.8
  • TI-2023-20585 Use after free in Accusoft ImageGear CVSS 3.1CRITICAL 9.8
  • TI-2023-17489 Memory corruption in Accusoft ImageGear CVSS 3.1CRITICAL 9.8
  • TI-2021-04983 A heap-based buffer overflow vulnerability exists in the Palette box parser functionality… CVSS 3.1CRITICAL 9.8
  • TI-2021-04994 Improper array index validation in Accusoft ImageGear CVSS 3.1HIGH 8.8
  • TI-2021-04992 Heap-based buffer overflow in Accusoft ImageGear CVSS 3.1HIGH 8.8
See all 57 →

Sources

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