CVE-2026-34706
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
InCopy versions 21.3, 20.5.3 and earlier are affected by an out-of-bounds write vulnerability that could lead to arbitrary code execution in the context of the current user. User interaction is required (opening a malicious file).
Risk Assessment
An attacker can craft a malicious file that, when opened, allows arbitrary code execution, potentially leading to workstation compromise and data theft.
Recommendation
Update InCopy to the latest version and instruct users not to open files from untrusted sources.
Other vulnerabilities in InCopy
See all- CVE-2026-34707High
Heap-based buffer overflow vulnerability in InCopy versions 21.3, 20.5.3 and earlier. Could lead to arbitrary code execution in the context of the current user after opening a malicious file.
- CVE-2025-61818High
A Use After Free vulnerability in InCopy versions 20.5, 19.5.5 and earlier could result in arbitrary code execution in the context of the current user. Exploitation requires user interaction, as the victim must open a malicious file.
- CVE-2025-61817High
A Use After Free vulnerability in InCopy versions 20.5, 19.5.5 and earlier could result in arbitrary code execution in the context of the current user. Exploitation requires user interaction, as the victim must open a malicious file.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS