Detections
Analytics
Adobe InCopy < 20.5.3 / 21.0 < 21.3.0 Multiple Vulnerabilities Arbitrary code execution (APSB26-33)
high Nessus Plugin ID 306385
Synopsis
The Adobe InCopy instance installed on the remote host is affected by multiple vulnerabilities.Description
The version of Adobe InCopy installed on the remote host is prior to 20.5.3, 21.3.0. It is, therefore, affected by multiple vulnerabilities as referenced in the APSB26-33 advisory.- InCopy versions 20.5.2, 21.2 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. (CVE-2026-34631)
- InCopy versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds read vulnerability when parsing a crafted file, which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file. (CVE-2026-27287)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Adobe InCopy version 20.5.3, 21.3.0 or later.See Also
https://helpx.adobe.com/security/products/incopy/apsb26-33.html
Plugin Details
Severity: High
ID: 306385
File Name: adobe_incopy_apsb26-33.nasl
Version: 1.2
Type: Local
Agent: windows, macosx, unix
Family: Misc.
Published: 4/14/2026
Updated: 4/14/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-34631
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:adobe:incopy
Required KB Items: installed_sw/Adobe InCopy
Exploit Ease: No known exploits are available
Patch Publication Date: 4/14/2026
Vulnerability Publication Date: 4/14/2026
Reference Information
CVE: CVE-2026-27287, CVE-2026-34631