Adobe Media Encoder: Out-of-bounds write allows arbitrary code execution
Summary
Adobe Media Encoder contains an out-of-bounds write vulnerability (CWE-787) that can lead to arbitrary code execution with the rights of the current user. An attacker needs to convince a victim to open a malicious file, so the attack is local and requires user interaction. Adobe rates the issue as high severity (CVSS 7.8), and the vulnerability is fixed in the bulletin APSB26-103.
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 26.5 line)
- Adobe Media Encoder 27.0 (for the 25.6 line, according to the CNA record; check the bulletin for per-branch guidance)
Workaround
Unknown.
Exploitation
- Adobe has not published exploitation status for APSB26-103 in the sources reviewed.
- CISA SSVC assessment: exploitation none, not automatable.
- No public proof of concept found at the time of research.
Our recommendation
- Inventory workstations with Adobe Media Encoder installed, typically creative, marketing or media teams.
- Update to 26.5.3 or 27.0 as described in APSB26-103, using the Creative Cloud desktop app or the Admin Console.
- Until patching, do not open project or media files from untrusted sources, such as unsolicited emails or downloads.
- Recheck CISA KEV and exploit trackers over the coming days, as the status may change.
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 Record CVE-2026-113545 www.cve.org
- Zero Day Initiative: November 2026 Security Update Review www.zerodayinitiative.com
- Strix CVE-2026-113545 www.strix.ai
- OffSeq Threat Radar CVE-2026-113545 radar.offseq.com
- Adobe Media Encoder security bulletins (helpx) 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, 02:10.
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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