# CVE-2021-44714: Adobe Acrobat Reader Missing Custom Protocols in Warning Message Prompts

CVE-2021-44714 is fixed in 2 products on 1 platform, first by Adobe Acrobat Reader DC 21.011.20039, released December 24, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-44714
- Priority: Routine
- CVSS: 3.3
- EPSS: 0.0250
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 14, 2022
- Weakness: CWE-657: Violation of Secure Design Principles (CWE-657)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-44714

## Description

Acrobat Reader DC version 21.007.20099 (and earlier), 20.004.30017 (and earlier) and 17.011.30204 (and earlier) are affected by a Violation of Secure Design Principles that could lead to a Security feature bypass. Acrobat Reader DC displays a warning message when a user clicks on a PDF file, which could be used by an attacker to mislead the user. In affected versions, this warning message does not include custom protocols when used by the sender. User interaction is required to abuse this vulnerability as they would need to click 'allow' on the warning message of a malicious file.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Adobe Acrobat Reader DC | 21.011.20039 | [Adobe Acrobat Reader DC 21.011.20039](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.32-bit-21.011.20039.md) | Dec 24, 2021 |
| Windows apps | Adobe Acrobat Reader DC (64-bit) | 21.011.20039 | [Adobe Acrobat Reader DC (64-bit) 21.011.20039](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.64-bit-21.011.20039.md) | Dec 24, 2021 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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