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Vulnerability DatabaseCVE-2021-28561

CVE-2021-28561: 
Adobe Acrobat Reader Continuous vulnerability analysis and mitigation

Overview

A memory corruption vulnerability was identified in Adobe Acrobat Reader DC affecting versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier), and 2017.011.30194 (and earlier). The vulnerability was discovered by Xu peng (xupeng_1231) and was assigned CVE-2021-28561 (Adobe Advisory, NVD).

Technical details

The vulnerability is classified as an Out-of-bounds Write (CWE-787) issue. It received a CVSS v3.1 Base Score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Under CVSS v2.0, it was rated with a Base Score of 6.8 (MEDIUM) with the vector (AV:N/AC:M/Au:N/C:P/I:P/A:P) (NVD).

Impact

If successfully exploited, this vulnerability could allow an unauthenticated attacker to achieve arbitrary code execution in the context of the current user. The execution would occur with the same privileges as the user running the application (NVD).

Mitigation and workarounds

Adobe has addressed this vulnerability in their security update APSB21-29. Users are advised to update to the latest version of Adobe Acrobat and Reader (Adobe Advisory).

Additional resources

Source: This report was generated using AI

Related Adobe Acrobat Reader Continuous vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-54257HIGH7.8
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CVE-2025-43579MEDIUM5.5
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NoYesSep 09, 2025

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