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 contain an out-of-bounds write vulnerability (CVE-2026-113547). An attacker can execute arbitrary code in the context of the current user. Exploitation requires that a victim opens a malicious file, for example one received by email or downloaded from an untrusted source.
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 for the 26.x branch
- Adobe Media Encoder 27.0 for the 25.x branch (per CVE record)
Workaround
Unknown. Adobe lists no workaround. Until the update is installed, do not open media or project files from untrusted sources. This is a stopgap and not a vendor-confirmed fix.
Exploitation
Adobe is not aware of any exploits in the wild for the issues in bulletin APSB26-103. CISA SSVC assessment: exploitation none, not automatable. Public proof of concept: unknown.
Our recommendation
- Update Adobe Media Encoder to 26.5.3 (26.x) or 27.0 (25.x) via the Creative Cloud desktop app or the Adobe Download Center.
- Identify workstations with Media Encoder installed and prioritise video, media and marketing teams.
- Until patched, do not open files from unknown or unverified senders and quarantine suspicious attachments.
- Monitor for public exploit reports and vendor updates.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Adobe Security Bulletin APSB26-103 www.adobe.com
- CVE-2026-113547 record mirror (CVE.org/Adobe data) cve.threatint.com
- CVE-2026-113547 analysis (Strix) www.strix.ai
- Zero Day Initiative: November 2026 security update review www.zerodayinitiative.com
- Media Encoder release notes (Adobe) helpx.adobe.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, 02:11.
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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