CVE-2021-21088

Name: CVE-2021-21088
Creator: NVD / NIST
Published: 2023-09-06T14:15:08.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2021-21088 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free 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

0.33%

25.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Adobe	Acrobat	>= 17.011.30180, < 17.011.30190
Adobe	Acrobat	>= 20.001.30005, < 20.001.30020
Adobe	Acrobat Dc	>= 15.007.20033, < 21.001.20135
Adobe	Acrobat Reader	>= 17.011.30180, < 17.011.30190
Adobe	Acrobat Reader	>= 20.001.30005, < 20.001.30020
Adobe	Acrobat Reader Dc	>= 15.007.20033, < 21.001.20135

References

https://helpx.adobe.com/security/products/acrobat/apsb21-09.htmlVendor Advisory
https://helpx.adobe.com/security/products/acrobat/apsb21-09.htmlVendor Advisory

Timeline

Published: Sep 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21088?

How severe is CVE-2021-21088?

CVE-2021-21088 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21088?

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-2021-21088?

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

Scan your code now

Source: NVD / NIST