Security readout for executives and security teams
Plain-English summary
A malicious After Effects file can trigger memory corruption and run code with the victim’s account permissions. An attacker must persuade a user to open the file, limiting remote reach but creating serious risk for creative teams handling external project assets.
Executive priority
Prioritize remediation for creative and production endpoints that routinely receive third-party files. Treat this as a high-priority workstation risk rather than an internet-facing emergency because exploitation requires user action and active exploitation is not established.
Technical view
CVE-2026-34690 is a stack-based buffer overflow (CWE-121) in Adobe After Effects. Successful exploitation may provide 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 impact.
Likely exposure
Workstations using the listed After Effects release lines are the likely exposure, especially where users open projects or assets from customers, contractors, shared storage, or unsolicited messages. The bundle identifies version boundaries of 26.3 and 25.6.6, but does not fully explain their range semantics.
Exploitation context
Exploitation requires a victim to open a malicious file. The supplied evidence does not establish active exploitation, and this CVE is not identified as being in CISA KEV. No exploit availability or observed campaign information is provided.
Researcher notes
The stated vector is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The bundle describes arbitrary code execution under the current user but provides no root-cause detail beyond CWE-121. Validate exact affected and fixed versions directly against Adobe APSB26-78; do not infer them solely from the abbreviated version arrays.
Mitigation direction
- Review Adobe advisory APSB26-78 for fixed releases and update affected installations promptly.
- Restrict opening untrusted After Effects files until remediation is confirmed.
- Route externally supplied project files through established content-screening and review processes.
- Use least-privileged user accounts to reduce post-exploitation impact.
Validation and detection
- Inventory After Effects installations and record exact versions and release channels.
- Compare installed versions against Adobe advisory APSB26-78 and its affected-version definitions.
- Confirm updates completed successfully and vulnerable releases are no longer present.
- Review endpoint alerts involving After Effects opening files from external or unusual locations.
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.