Security readout for executives and security teams
Plain-English summary
CVE-2021-40398 is a high-severity memory corruption flaw in Accusoft ImageGear 19.10. A maliciously malformed file can trigger an out-of-bounds write while raster data is parsed, potentially affecting confidentiality, integrity, and availability.
Executive priority
Prioritize inventory and remediation for internet-facing or high-volume file-processing systems. The business risk is highest where untrusted files can reach ImageGear parsing in critical workflows.
Technical view
The flaw is a CWE-119 out-of-bounds write in ImageGear 19.10 parse_raster_data. The CVSS 3.0 score is 8.1 with network attack vector, high complexity, no privileges, and high impact across confidentiality, integrity, and availability.
Likely exposure
Exposure is most likely where ImageGear 19.10 is embedded in applications or services that process user-supplied image or raster files, especially upload, conversion, document-processing, or preview workflows.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. It states an attacker can provide a specially crafted malformed file to trigger memory corruption, but does not provide exploit status.
Researcher notes
Evidence identifies ImageGear 19.10 and parse_raster_data. The bundle does not name a fixed version, patch, or mitigation. Avoid assuming exploitability beyond the stated memory corruption and CVSS impact.
Mitigation direction
- Identify systems or products using Accusoft ImageGear 19.10.
- Check Accusoft guidance for fixed versions or vendor-recommended remediation.
- Restrict untrusted file processing where business impact allows.
- Isolate file-processing services from sensitive systems and data.
- Monitor file-processing crashes or abnormal memory-fault patterns.
Validation and detection
- Review SBOMs, build manifests, and vendor components for ImageGear 19.10.
- Map workflows that accept externally supplied raster or image files.
- Confirm whether affected parsing is reachable from public or partner-facing inputs.
- Verify compensating controls around upload, conversion, and preview services.
- Document remediation status against vendor guidance once confirmed.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-40398 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/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:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:H/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-2021-1411CVE 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.