CVE-2026-21281
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
InCopy versions 21.0, 19.5.5 and earlier are affected by a heap-based buffer overflow that could allow arbitrary code execution in the context of the current user. Exploitation requires user interaction, such as opening a malicious file.
Risk Assessment
An attacker could execute arbitrary code on the victim's system, potentially leading to full control. The risk is high as opening a malicious file is sufficient.
Recommendation
Update InCopy to the latest version. Avoid opening files from untrusted sources.
Other vulnerabilities in Adobe InCopy
See all- CVE-2026-34708High
Adobe InCopy versions 21.3, 20.5.3 and earlier are affected by a stack-based buffer overflow vulnerability that could allow arbitrary code execution in the context of the current user.
- CVE-2026-34631High
An out-of-bounds write vulnerability in Adobe InCopy versions 20.5.2, 21.2 and earlier. It could allow arbitrary code execution in the context of the current user. Exploitation requires user interaction – opening a malicious file.
- CVE-2025-61816High
A heap-based buffer overflow vulnerability in Adobe 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 in that a victim must open a malicious file.
Original NVD description (English source)
InCopy versions 21.0, 19.5.5 and earlier are affected by a Heap-based Buffer Overflow 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