# CVE-2026-27287: Adobe InCopy out-of-bounds read in file parsing

Source: https://junglewise.ai/threats/cve-2026-27287-adobe-incopy-out-of-bounds-read-in-file-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-14. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2026-27287 · Severity: high · CVSS 7.8 · Published 2026-04-14

Adobe InCopy, a professional writing and editing software, is vulnerable to a security flaw when processing specially crafted files. If a user is tricked into opening a malicious file, an attacker could gain the ability to run unauthorized code on the victim's computer. This could lead to a full system compromise, data theft, or disruption of business operations.

Technologies: [Adobe InCopy](https://junglewise.ai/threats/technologies/incopy). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe).

## Quick answers

**Is CVE-2026-27287 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-27287 being exploited in the wild.

**How severe is CVE-2026-27287?** High severity, with a CVSS score of 7.8, published 14 April 2026.

**Which products and versions are affected?** Adobe InCopy 20.5.2, 21.2 and earlier.

**Is there a fix for CVE-2026-27287?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-27287 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-27287?** Check whether you run Adobe InCopy at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An out-of-bounds read vulnerability (CWE-125) exists in Adobe InCopy versions 20.5.2, 21.2 and earlier. The flaw is triggered during the parsing of specifically crafted files, leading to a read past the end of an allocated memory structure. While primarily a memory exhaustion or information disclosure class of bug, Adobe notes this specific vulnerability can be leveraged to achieve arbitrary code execution in the context of the current user. Exploitation requires local access and user interaction, specifically that a victim must be induced into opening a malicious file. Adobe has addressed this in newer versions (20.5.3 and 21.3).

## Affected products

- Adobe InCopy 20.5.2, 21.2 and earlier

## Timeline

- 2026-04-14: disclosed
- 2026-04-14: advisory: Adobe published APSB26-33

## References

- [https://helpx.adobe.com/security/products/incopy/apsb26-33.html](https://helpx.adobe.com/security/products/incopy/apsb26-33.html)

## Related threats

- [Adobe InCopy stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-34708-adobe-incopy-stack-based-buffer-overflow)
- [Adobe InCopy heap overflow in file parsing](https://junglewise.ai/threats/cve-2026-34707-adobe-incopy-heap-overflow-in-file-parsing)
- [Adobe InCopy out-of-bounds write vulnerability](https://junglewise.ai/threats/cve-2026-34706-adobe-incopy-out-of-bounds-write-vulnerability)
- [Adobe InCopy out-of-bounds write](https://junglewise.ai/threats/cve-2026-34631-adobe-incopy-out-of-bounds-write)
- [InCopy versions 20.5, 19.5.5 and earlier are affected by a Use After Free vulnerability that could result in arbitrary…](https://junglewise.ai/threats/cve-2025-61818-incopy-versions-20-5-19-5-5-and-earlier-are-affected-by-a-use)