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Vulnerability DatabaseCVE-2021-28555

CVE-2021-28555: 
Adobe Acrobat Reader Continuous vulnerability analysis and mitigation

Overview

Adobe Acrobat Reader DC is affected by an Out-of-bounds Read vulnerability (CVE-2021-28555) in versions 2021.001.20150 and earlier, 2020.001.30020 and earlier, and 2017.011.30194 and earlier. This vulnerability was discovered by Haboob Labs and publicly disclosed in 2021 (Adobe Advisory, NVD).

Technical details

The vulnerability is classified as an Out-of-bounds Read (CWE-125) issue. It received a CVSS v3.0 base score of 6.5 (Medium) with the vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, indicating network accessibility with required user interaction (NVD).

Impact

When successfully exploited, this vulnerability allows an unauthenticated attacker to access sensitive information in the context of the current user. The impact is limited to information disclosure without affecting system integrity or availability (NVD).

Mitigation and workarounds

Adobe has addressed this vulnerability in their security update. Users should update to versions newer than 2021.001.20150 for the Continuous track, 2020.001.30020 for the Classic 2020 track, or 2017.011.30194 for the Classic 2017 track (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-2025-47112MEDIUM5.5
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  • Adobe Acrobat Reader ContinuousAdobe Acrobat Reader Continuous
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CVE-2025-43579MEDIUM5.5
  • Adobe Acrobat Reader ContinuousAdobe Acrobat Reader Continuous
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CVE-2025-54255MEDIUM4
  • Adobe Acrobat Reader ContinuousAdobe Acrobat Reader Continuous
  • cpe:2.3:a:adobe:acrobat_reader
NoYesSep 09, 2025

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