Security readout for executives and security teams
Plain-English summary
CVE-2021-40211 is a reported divide-by-zero flaw in ImageMagick 7.1.0-4 when reading Enhanced Metafile content. In business terms, the likely concern is service disruption if a system processes crafted image files. The source bundle does not provide severity scoring, affected version range, or confirmed fix details.
Executive priority
Treat this as a focused availability risk until more evidence is available. Prioritize review if ImageMagick handles untrusted uploads in customer-facing services; otherwise manage through normal vulnerability maintenance and vendor tracking.
Technical view
The CVE description identifies a division by zero in ImageMagick function ReadEnhMetaFile in coders/emf.c. The named version is ImageMagick 7.1.0-4. No CVSS, CWE, affected CPEs, patch commit, or exploit evidence is provided in the bundle.
Likely exposure
Exposure is most plausible where ImageMagick processes EMF or user-supplied image/document content. The bundle only names ImageMagick 7.1.0-4, so broader version exposure cannot be confirmed from these sources.
Exploitation context
CISA KEV status is false in the bundle, and no cited source confirms active exploitation. The public reference is an ImageMagick GitHub issue, but the provided data does not establish weaponized exploitation or real-world attacks.
Researcher notes
The record is sparse: no CVSS, CWE, CPE, full affected range, or confirmed fix is included. Analysis should stay limited to a divide-by-zero condition in ReadEnhMetaFile for ImageMagick 7.1.0-4 unless upstream evidence adds scope.
Mitigation direction
- Inventory systems and packages using ImageMagick, especially version 7.1.0-4.
- Check ImageMagick upstream guidance for fixed versions or official mitigation.
- Reduce untrusted EMF processing where operationally feasible.
- Run image conversion services with isolation and resource limits.
- Prioritize externally exposed upload or conversion workflows first.
Validation and detection
- Confirm whether deployed builds include ImageMagick EMF handling.
- Identify workflows that accept user-supplied images or documents.
- Check dependency manifests and container images for ImageMagick versions.
- Review service logs for unexplained ImageMagick conversion crashes.
- Track the upstream GitHub issue for remediation evidence.
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.
CVE-2021-40211 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ImageMagick/ImageMagick/issues/4097CVE reference
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.