CVE-2021-28545

Name: CVE-2021-28545
Creator: NVD / NIST
Published: 2021-04-01T14:15:13.39+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 2.27%

Last modified Jun 17, 2026

CVE-2021-28545 is a high-severity vulnerability rated 8.1/10 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 missing support for an integrity check. An unauthenticated attacker would have the ability to completely manipulate data in a certified PDF without invalidating the original certification. EPSS estimates a 2.27% 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 missing support for an integrity check. An unauthenticated attacker would have the ability to completely manipulate data in a certified PDF without invalidating the original certification. Exploitation of this issue requires user interaction in that a victim must open the tampered file.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

2.27%

80.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-353

Affected Software

Vendor	Product	Versions
Adobe	Acrobat	>= 17.011.30059, <= 17.011.30188
Adobe	Acrobat	>= 20.001.30005, <= 20.001.30018
Adobe	Acrobat Dc	>= 15.008.20082, <= 20.013.20074
Adobe	Acrobat Reader	>= 17.011.30059, <= 17.011.30188
Adobe	Acrobat Reader	>= 20.001.30005, <= 20.001.30018
Adobe	Acrobat Reader Dc	>= 15.008.20082, <= 20.013.20074

References

https://helpx.adobe.com/security/products/acrobat/apsb21-09.htmlPatch, Vendor Advisory
https://helpx.adobe.com/security/products/acrobat/apsb21-09.htmlPatch, Vendor Advisory

Timeline

Published: Apr 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28545?

How severe is CVE-2021-28545?

CVE-2021-28545 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 2.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28545?

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-2021-28545?

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

Scan your code now

Source: NVD / NIST