Adobe Media Encoder: Out-of-bounds write allows arbitrary code execution
Summary
Adobe Media Encoder 26.5.2 and earlier and 25.6.6 and earlier on Windows and macOS contain an out-of-bounds write flaw (CWE-787). An attacker can execute arbitrary code with the rights of the current user. Exploitation requires that a victim opens a malicious file, for example one delivered by email, download or shared drive.
Affected
- Adobe Media Encoder 26.5.2 and earlier (Windows and macOS)
- Adobe Media Encoder 25.6.6 and earlier (Windows and macOS)
Fixed in
- Adobe Media Encoder 26.5.3
- Adobe Media Encoder 27.0
Workaround
No vendor workaround known. Until patched:
- Open only media files from trusted sources.
- Run workstations with standard user rights rather than administrator rights.
Exploitation
- Adobe is not aware of any exploits in the wild for the issues in this update.
- No public exploitation reported at the time of publication.
Our recommendation
- Update Adobe Media Encoder to 26.5.3 or 27.0 via Creative Cloud or your admin deployment.
- Prioritise workstations that open files from external sources.
- Monitor the Adobe bulletin APSB26-103 and CISA KEV for changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Adobe Security Bulletin APSB26-103 www.adobe.com
- Strix CVE-2026-113541 www.strix.ai
- Zero Day Initiative: November 2026 Security Update Review www.zerodayinitiative.com
- OffSeq Radar: CVE-2026-113541 radar.offseq.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 02:12.
Original description (NVD)
Media Encoder is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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