Security readout for executives and security teams
Plain-English summary
CVE-2021-42732 is a high-severity Adobe InDesign flaw triggered when a user opens or processes a crafted GIF file. The issue is memory access beyond a buffer, which can crash the application and may allow serious compromise under the CVSS impact ratings. User interaction is required.
Executive priority
Treat this as a high-priority workstation patching issue for creative or publishing teams. It is not evidenced as actively exploited here, but the high CVSS impact and file-opening attack path justify prompt remediation.
Technical view
The CVE describes CWE-788, access of memory location after end of buffer, in Adobe InDesign while parsing GIF content. The CVSS 3.1 vector is local, low complexity, no privileges required, user interaction required, unchanged scope, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to systems with Adobe InDesign installed. The affected version range is unspecified in the provided bundle, so teams should inventory InDesign deployments and compare them against Adobe APSB21-73 guidance.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires a user to open or interact with a malicious GIF-handling workflow in InDesign, making phishing or document-delivery scenarios the main concern.
Researcher notes
Evidence is thin on exact affected versions in the supplied bundle. Analysis should stay anchored to Adobe APSB21-73, the CVE record, CWE-788, and the CVSS vector. Avoid assuming exploit availability or fixed builds without checking the vendor bulletin.
Mitigation direction
- Review Adobe APSB21-73 for affected and fixed InDesign versions.
- Update Adobe InDesign according to Adobe’s security bulletin guidance.
- Restrict unsolicited GIF or design-file handling from untrusted sources.
- Use endpoint controls to reduce impact from malicious file-opening workflows.
Validation and detection
- Inventory endpoints with Adobe InDesign installed.
- Compare installed InDesign versions against Adobe APSB21-73.
- Confirm patch deployment through software management records.
- Review endpoint alerts for crashes linked to suspicious GIF handling.
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-788: 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-2021-42732 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/indesign/apsb21-73.htmlCVE 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.
Access of Memory Location After End of Buffer
Access of Memory Location After End of Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.