Read the docs
TI-2021-04959 Aliases CVE-2021-21914GHSA-98fc-8mvh-6qgf

Heap-based buffer overflow in Accusoft ImageGear

Priority HIGH 79CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
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-122 and the CVSS impact.

Summary

A heap-based buffer overflow vulnerability exists in the DecoderStream::Append functionality of Accusoft ImageGear 19.10. A specially-crafted file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01595 75th 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

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AccusoftImageGear19.10—No fix listedCNA
  • ImageGear VendorAccusoft Affected 19.10 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:accusoft:imagegear:19.10:*:*:*:*:*:*:*19.10VulnerableAccusoft
  • cpe:2.3:a:accusoft:imagegear:19.10:*:*:*:*:*:*:* Versions 19.10 Vulnerable ·Accusoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21914
  2. 2026-10-03 Alias added: GHSA-98fc-8mvh-6qgf

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