CVE-2021-21089

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 affected by an out-of-bounds Read vulnerability. An unauthenticated attacker could leverage this vulnerability to locally escalate privileges in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

At a glance

Exploitability

Can be exploited locally on the machine without logging in, but needs a user to act. Limited direct impact.

Exploit odds

1.9% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-09-30 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 03:34 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.9% in the next 30 days (EPSS).
• Severity: 3.3 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-09-30 15:15 UTC

Last modified

2026-06-17 03:34 UTC

Exploit probability

1.9% · EPSS, next 30 days

Weakness

CWE-125 · Out-of-bounds read

Record status

Modified

Affected

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

Attack profile CVSS 3.1 · 3.3

Attack vector

Local

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-21089.md and follow it. Check whether this project is affected by CVE-2021-21089. 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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