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Public proof of concept

CVE-2021-21938

A public proof of concept exists; no exploitation attested.

  • Published2022-04-14
  • WeaknessCWE-193

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A heap-based buffer overflow vulnerability exists in the Palette box parser 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.

Timeline

dates in UTC
  1. 2022-04-1420:15CVE publishedNVD

Versions per branch

NVD
Accusoft imagegear
BranchAffectedFixed in
19.10= 19.10no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-04-15
  • CNACVSS 3.19.8known since 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • CNAweakness (CWE)CWE-193known since 2026-10-23
  • NVDweakness (CWE)CWE-193read 2026-10-23
  • FIRST EPSSEPSS score1.9 %2026-11-08
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2022-04-14
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-453x-fr3c-fmj5

Frequently asked questions

What is CVE-2021-21938?

A heap-based buffer overflow vulnerability exists in the Palette box parser 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.

Is CVE-2021-21938 actively exploited?

A proof-of-concept exploit exists for CVE-2021-21938, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2021-21938?

CVE-2021-21938 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record