InCopy OOBW in 21.3 & 20.5.3 (Adobe) code exec
CVE-2026-34706 Published on June 9, 2026
InCopy | Out-of-bounds Write (CWE-787)
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 Analysis
CVE-2026-34706 is exploitable with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-34706 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-34706
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Affected Versions
Adobe InCopy:- Before and including 20.5.3 is affected.