Security readout for executives and security teams
Plain-English summary
Accusoft ImageGear 19.10 can mishandle specially crafted JPEG-JFIF files. If a vulnerable application processes such a file, memory corruption may allow code execution. This is business-critical where ImageGear is used in upload, document, image conversion, or content-processing workflows handling untrusted files.
Executive priority
Treat as urgent for any business system that processes untrusted images with ImageGear 19.10. The potential impact is full confidentiality, integrity, and availability compromise. If ImageGear is absent, document non-exposure; if present, assign immediate remediation ownership.
Technical view
CVE-2021-21949 is an improper array index validation flaw in ImageGear 19.10's JPEG-JFIF Scan header parser. The reported impact is out-of-bounds write with potential code execution. CVSS 3.0 is 9.8, with network attack vector, low complexity, no privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is likely limited to software or services embedding Accusoft ImageGear 19.10 and parsing JPEG-JFIF content. Risk is highest when files come from external users, partners, email, uploads, or automated ingestion pipelines. The source bundle does not identify other affected versions or downstream products.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. Public disclosure exists through Cisco Talos and CVE records. The described attack requires providing a malicious file to a vulnerable parser, but no exploit activity should be assumed from the supplied evidence.
Researcher notes
Key uncertainty is remediation detail: the supplied sources name ImageGear 19.10 but do not include fixed versions or vendor mitigation text. Avoid broad version assumptions. Validate exposure through dependency inventory, embedded library review, and data-flow analysis for untrusted JPEG-JFIF inputs.
Mitigation direction
- Inventory applications and services using Accusoft ImageGear 19.10.
- Check Accusoft guidance for fixed versions or supported remediation.
- Prioritize remediation on internet-facing or automated file-processing systems.
- Restrict untrusted JPEG-JFIF processing until remediation is confirmed.
- Apply least-privilege isolation to services that parse uploaded images.
Validation and detection
- Confirm whether ImageGear 19.10 is present in deployed applications.
- Map all workflows that parse JPEG-JFIF files with ImageGear.
- Identify externally supplied file paths into affected parsers.
- Verify vendor remediation status against installed ImageGear builds.
- Review monitoring for crashes in image parsing services.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-129: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-21949 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.8CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1377CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.