Security readout for executives and security teams
Plain-English summary
A malicious file opened in Adobe After Effects could let an attacker run code with the victim’s user privileges. This could expose or alter data and disrupt the workstation. User interaction is required, but creative teams commonly exchange files, making targeted delivery plausible.
Executive priority
Treat as a high-priority workstation remediation issue for creative and production teams. Expedite vendor-guided updating where external files are routinely opened, while recognizing that exploitation requires user action and active exploitation is not established by the supplied evidence.
Technical view
CVE-2026-21330 is a CWE-843 type-confusion vulnerability in Adobe After Effects. A crafted file can trigger arbitrary code execution as the current user. CVSS 3.1 is 7.8: local attack vector, low complexity, no privileges required, user interaction required, and high confidentiality, integrity, and availability impacts.
Likely exposure
Workstations running After Effects 25.6 or earlier are potentially exposed, particularly where users open files from external collaborators, downloads, email, or shared storage. The supplied structured version data conflicts with the description, so exact affected-version boundaries should be confirmed against Adobe’s advisory.
Exploitation context
Exploitation requires a victim to open a malicious file. The bundle does not establish active exploitation, and the CVE is not identified as CISA KEV-listed. No public exploit availability or observed campaign information is provided.
Researcher notes
The supplied description identifies versions 25.6 and earlier, while the structured affected data lists 25.6.4 and 26.0 with a default unaffected status. This discrepancy prevents a confident version-range conclusion. Consult Adobe APSB26-15 and the current CVE record before building detection or compliance logic.
Mitigation direction
- Check Adobe’s APSB26-15 advisory and apply the vendor-specified security update.
- Prioritize systems whose users routinely receive After Effects files from external parties.
- Restrict or isolate opening of untrusted files until affected installations are remediated.
- Use least-privilege user accounts to limit damage from successful code execution.
Validation and detection
- Inventory installed After Effects versions across managed endpoints.
- Compare detected versions with Adobe APSB26-15’s authoritative affected and fixed-version tables.
- Verify the vendor-specified update is installed and persists after application restart.
- Review endpoint telemetry for suspicious activity following the opening of untrusted files.
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-843: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-21330 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.
SSVC decision data
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:H1.85.9adobeVulnerability 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/after_effects/apsb26-15.htmlCVE reference, adobe · vendor-advisory
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 Resource Using Incompatible Type ('Type Confusion')
Access of Resource Using Incompatible Type ('Type Confusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.