Security readout for executives and security teams
Plain-English summary
A malicious After Effects file could exploit a memory-reading error when opened, potentially allowing attacker-controlled code to run with the victim’s permissions. The victim must open the file, so exposure is concentrated among users receiving projects or media from external or untrusted sources.
Executive priority
Address promptly through normal high-severity remediation, with accelerated action for creative teams handling external files. User interaction reduces immediate exposure, but successful exploitation could compromise data, alter files, or disrupt operations within the user’s access.
Technical view
CVE-2026-21322 is a CWE-125 out-of-bounds read in After Effects file parsing. It carries CVSS 3.1 score 7.8 (high) and may enable code execution as the current user. The vector is local, requires no privileges, has low complexity, and requires user interaction.
Likely exposure
Prioritize systems running After Effects versions described as 25.6 and earlier, especially where users open externally supplied files. The bundle’s structured version data is ambiguous, listing 25.6.4 and 26.0 while marking unspecified versions unaffected; confirm exact affected and fixed builds through Adobe’s advisory.
Exploitation context
Exploitation requires a victim to open a crafted file. The bundle does not identify CVE-2026-21322 as CISA KEV-listed and provides no evidence of active exploitation. Treat malicious files delivered through email, collaboration platforms, downloads, or contractors as the likely attack path.
Researcher notes
The supplied record supports an out-of-bounds read during crafted-file parsing with potential current-user code execution. CVSS impact ratings are high for confidentiality, integrity, and availability. No exploit mechanics, observed campaigns, or confirmed patch version are included. The inconsistent version representation warrants direct validation against Adobe APSB26-15.
Mitigation direction
- Review Adobe APSB26-15 and update After Effects to the vendor-designated fixed build.
- Prioritize users who routinely receive After Effects files from outside the organization.
- Block or quarantine unexpected After Effects files from untrusted delivery channels.
- Reinforce verification of externally supplied project files before opening them.
Validation and detection
- Inventory installed After Effects versions and exact build numbers across managed endpoints.
- Compare each build against the affected and fixed versions in Adobe APSB26-15.
- Identify users and workflows that accept project files from external parties.
- Confirm deployment completion through endpoint or software-management inventory.
- Review security telemetry for suspicious activity following After Effects file openings.
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-125: 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-2026-21322 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.