CVE-2021-28546

6.5 MEDIUM 1% exploit odds Fix listed

What it is

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 could leverage this vulnerability to modify content in a certified PDF without invalidating the certification. Exploitation of this issue requires user interaction in that a victim must open the tampered file.

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. High risk of data tampering.
Exploit odds: 1.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-04-01 14:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:46 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.5% in the next 30 days (EPSS).
Severity: 6.5 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-04-01 14:15 UTC
Last modified: 2026-06-17 03:46 UTC
Exploit probability: 1.5% · EPSS, next 30 days
Weakness: CWE-353
Record status: Modified

Affected

Adobe Acrobat ≤ 17.011.30188
Adobe Acrobat ≤ 20.001.30018
Adobe Acrobat Dc ≤ 20.013.20074
Adobe Acrobat Reader ≤ 17.011.30188
Adobe Acrobat Reader ≤ 20.001.30018
Adobe Acrobat Reader Dc ≤ 20.013.20074

Attack profile CVSS 3.1 · 6.5

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Raw vector

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

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2021-28546.md and follow it. Check whether this project is affected by CVE-2021-28546. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record