CVE-2026-34706: Out-of-bounds Write (CWE-787) in Adobe InCopy
InCopy versions 21.3, 20.5.3 and earlier are 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.
AI Analysis
Technical Summary
CVE-2026-34706 is an out-of-bounds write vulnerability in Adobe InCopy affecting versions up to and including 20.5.3 and 21.3. The vulnerability allows arbitrary code execution in the context of the current user upon opening a malicious file. The attack vector requires local access and user interaction, with low attack complexity and no privileges required. The vulnerability impacts confidentiality, integrity, and availability with high severity.
Potential Impact
Successful exploitation can lead to arbitrary code execution with the privileges of the current user, potentially compromising system confidentiality, integrity, and availability. The attack requires the victim to open a malicious file, so social engineering or tricking the user is necessary. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented. Users should exercise caution when opening files from untrusted sources until a patch is available.
CVE-2026-34706: Out-of-bounds Write (CWE-787) in Adobe InCopy
Description
InCopy versions 21.3, 20.5.3 and earlier are 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.
CVSS v3.1
Score 7.8high
Affected software
Adobe
InCopy
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34706 is an out-of-bounds write vulnerability in Adobe InCopy affecting versions up to and including 20.5.3 and 21.3. The vulnerability allows arbitrary code execution in the context of the current user upon opening a malicious file. The attack vector requires local access and user interaction, with low attack complexity and no privileges required. The vulnerability impacts confidentiality, integrity, and availability with high severity.
Potential Impact
Successful exploitation can lead to arbitrary code execution with the privileges of the current user, potentially compromising system confidentiality, integrity, and availability. The attack requires the victim to open a malicious file, so social engineering or tricking the user is necessary. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented. Users should exercise caution when opening files from untrusted sources until a patch is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- adobe
- Date Reserved
- 2026-03-30T17:30:36.498Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a28f1e98dd33fbd85e94453
Added to database: 06/10/2026, 05:11:05 UTC
Last enriched: 06/17/2026, 09:24:32 UTC
Last updated: 09/12/2026, 22:01:33 UTC
Views: 108
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