Is CVE-2026-34708 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34708 being exploited in the wild.

How severe is CVE-2026-34708?

High severity, with a CVSS score of 7.8, published 9 June 2026.

Which products and versions are affected?

Adobe InCopy 21.3, 20.5.3 and earlier.

Is there a fix for CVE-2026-34708?

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-2026-34708 attacked?

It is attacked with local access, in a network appliance.

Am I affected by CVE-2026-34708?

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.

CVE-2026-34708: Adobe InCopy stack-based buffer overflow

CVE-2026-34708 · Severity: high · CVSS 7.8 · Published 2026-06-09

Adobe InCopy, a professional writing and editing software, is affected by a security flaw that could allow an attacker to take control of a user's system. To exploit this, an attacker must trick a user into opening a specially crafted malicious file. If successful, the attacker could run unauthorized commands or software with the same permissions as the logged-in user, potentially leading to data theft or full system compromise.

Technologies: Adobe InCopy. Vendors: Adobe.

Quick answers

Is CVE-2026-34708 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34708 being exploited in the wild.
How severe is CVE-2026-34708?: High severity, with a CVSS score of 7.8, published 9 June 2026.
Which products and versions are affected?: Adobe InCopy 21.3, 20.5.3 and earlier.
Is there a fix for CVE-2026-34708?: 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-2026-34708 attacked?: It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-34708?: 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

A stack-based buffer overflow (CWE-121) exists in Adobe InCopy versions 21.3, 20.5.3 and earlier. The vulnerability is triggered when the application improperly handles memory while parsing a specially crafted file. An attacker can exploit this by convincing a user to open a malicious document, leading to arbitrary code execution in the context of the current user. The attack vector is local with a requirement for user interaction (UI:R). Adobe has addressed this in security bulletin APSB26-59.

Affected products

Adobe InCopy 21.3, 20.5.3 and earlier

Timeline

2026-06-09: disclosed
2026-06-09: advisory

References

https://helpx.adobe.com/security/products/incopy/apsb26-59.html

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