Adobe After Effects Stack-Based Buffer Overflow (CVE-2026-34690) Allows RCE
The National Vulnerability Database reports a critical stack-based buffer overflow vulnerability, CVE-2026-34690, affecting Adobe After Effects versions 26.0, 25.6.4, and earlier. This flaw carries a CVSSv3.1 score of 7.8 (High), indicating a significant risk.
Successful exploitation of this vulnerability could lead to arbitrary code execution in the context of the current user. Attackers can leverage this by tricking a victim into opening a specially crafted malicious file. This user interaction requirement is a common attack vector, often delivered via phishing or malicious downloads.
Defenders need to recognize that applications like After Effects are prime targets. Creative professionals often handle external files, making them high-value targets for adversaries seeking initial access or lateral movement. Patching is non-negotiable, but equally important is robust endpoint detection and user awareness training to spot malicious files.
What This Means For You
- If your organization uses Adobe After Effects, prioritize patching to versions beyond 26.0 and 25.6.4 immediately. Audit your systems for any unpatched instances and reinforce user training on identifying and avoiding suspicious files, especially those sent from unknown sources or unexpected contexts. This isn't just about data; it's about preventing full system compromise.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-34690 - Adobe After Effects Malicious File Open
title: CVE-2026-34690 - Adobe After Effects Malicious File Open
id: scw-2026-05-12-ai-1
status: experimental
level: critical
description: |
Detects the execution of Adobe After Effects (AfterFX.exe) when launched by common office applications (Word, Excel, Outlook) and processing a file with a typical After Effects extension (.aep, .aec). This indicates a potential exploitation of CVE-2026-34690 via a malicious file opened by a user.
author: SCW Feed Engine (AI-generated)
date: 2026-05-12
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-34690/
tags:
- attack.execution
- attack.t1204.002
logsource:
category: process_creation
detection:
selection:
Image|endswith:
- 'AfterFX.exe'
ParentImage|contains:
- 'winword.exe'
- 'excel.exe'
- 'outlook.exe'
CommandLine|contains:
- '.aep'
- '.aec'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-34690 | Buffer Overflow | Adobe After Effects versions 26.0, 25.6.4 and earlier |
| CVE-2026-34690 | RCE | Stack-based Buffer Overflow leading to arbitrary code execution |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 12, 2026 at 23:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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