Security readout for executives and security teams
Plain-English summary
CVE-2026-21319 is an information-disclosure flaw in Adobe After Effects. A victim must open a malicious file, after which an attacker may access sensitive information held in application memory. The supplied severity is medium, with no evidence of data modification, service disruption, or code execution.
Executive priority
Prioritize timely workstation remediation, especially for creative teams regularly receiving external project files. This is not supported as an emergency, actively exploited issue, but potential memory disclosure warrants action through the normal vulnerability-management cycle.
Technical view
The issue is an out-of-bounds read (CWE-125) with CVSS 3.1 score 5.5 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). It requires local file processing and user interaction. The stated impact is high confidentiality loss without integrity or availability impact.
Likely exposure
Workstations using affected After Effects releases and opening files from external or untrusted sources have the clearest exposure. The description says versions 25.6 and earlier, but the supplied affected-version data is ambiguous and should be reconciled against Adobe's advisory.
Exploitation context
Exploitation requires a user to open a malicious file. The supplied bundle marks the CVE as absent from KEV and provides no cited evidence of active exploitation or a public exploit. No stronger exploitation claim is supported.
Researcher notes
The source bundle contains a version ambiguity: its description says 25.6 and earlier, while structured version entries include 25.6.4 and 26.0 with a default unaffected status. Treat Adobe APSB26-15 as authoritative for exact affected and fixed builds. Evidence supports information disclosure only.
Mitigation direction
- Review Adobe advisory APSB26-15 for the vendor-approved fixed release and deployment guidance.
- Update affected After Effects installations according to Adobe's guidance.
- Restrict or scrutinize After Effects files received from untrusted or unexpected sources.
- Use endpoint and email controls to reduce delivery of suspicious creative-project files.
Validation and detection
- Inventory installed After Effects versions across managed workstations.
- Compare discovered versions with Adobe advisory APSB26-15's affected and fixed release details.
- Confirm updates completed successfully through software-management or endpoint inventory records.
- Review security telemetry for suspicious files opened by After Effects users.
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-2026-21319 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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:N/A:N1.83.6adobeVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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.