CVE-2021-28551

Name: CVE-2021-28551
Creator: NVD / NIST
Published: 2021-08-24T18:15:07.35+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 3.39%

Last modified Jun 17, 2026

CVE-2021-28551 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Acrobat Reader DC versions versions 2021.001.20155 (and earlier), 2020.001.30025 (and earlier) and 2017.011.30196 (and earlier) are affected by an Out-of-bounds read vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. EPSS estimates a 3.39% chance of exploitation in the next 30 days.

Description

Acrobat Reader DC versions versions 2021.001.20155 (and earlier), 2020.001.30025 (and earlier) and 2017.011.30196 (and earlier) are affected by an Out-of-bounds read vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

3.39%

87.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Adobe	Acrobat Dc	>= 15.008.20082, <= 21.001.20150
Adobe	Acrobat Reader Dc	>= 15.008.20082, <= 21.001.20150
Adobe	Acrobat Dc	>= 15.008.20082, <= 21.001.20149
Adobe	Acrobat Reader Dc	>= 15.008.20082, <= 21.001.20149
Adobe	Acrobat	>= 17.011.30180, <= 17.011.30194
Adobe	Acrobat	>= 20.001.30005, <= 20.001.30020
Adobe	Acrobat Reader	>= 17.011.30180, <= 17.011.30194
Adobe	Acrobat Reader	>= 20.001.30005, <= 20.001.30020

References

https://helpx.adobe.com/security/products/acrobat/apsb21-29.htmlVendor Advisory
https://helpx.adobe.com/security/products/acrobat/apsb21-29.htmlVendor Advisory

Timeline

Published: Aug 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28551?

How severe is CVE-2021-28551?

CVE-2021-28551 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 3.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28551?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28551?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST