Security readout for executives and security teams
Plain-English summary
A malicious After Effects file can trigger a stack buffer overflow and run code as the person who opens it. The main business risk is compromise of workstations used for video or creative workflows, especially where users handle external project files.
Executive priority
Treat as high priority for creative and media teams because compromise requires user action but could give an attacker full user-context code execution on production workstations.
Technical view
CVE-2026-34690 is a CWE-121 stack-based buffer overflow in Adobe After Effects. CVSS 3.1 is 7.8 with local attack vector, low complexity, no privileges, user interaction required, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to systems running affected Adobe After Effects versions, including the listed 26.3 and 25.6.6 version lines, especially endpoints opening untrusted media or project files.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires a victim to open a malicious file, so phishing, file sharing, or third-party creative assets are the likely delivery paths.
Researcher notes
Evidence supports arbitrary code execution via stack-based buffer overflow after opening a malicious file. The provided bundle does not include exploit availability, proof-of-concept details, or explicit fixed versions, so remediation should follow Adobe’s advisory.
Mitigation direction
- Review Adobe APSB26-78 for fixed versions and deployment guidance.
- Prioritize updates for creative workstations running affected After Effects versions.
- Restrict opening After Effects files from untrusted sources until remediated.
- Use endpoint controls to monitor suspicious child processes from After Effects.
- Apply least privilege for creative users where operationally feasible.
Validation and detection
- Inventory installed Adobe After Effects versions across managed endpoints.
- Compare detected versions with Adobe APSB26-78 affected and fixed version guidance.
- Confirm creative teams do not rely on affected builds after remediation.
- Review EDR logs for unusual After Effects process behavior.
- Check whether users received or opened unexpected After Effects 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-121: 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-2026-34690 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/apsb26-78.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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.