# CVE-2021-40730: Adobe Acrobat Reader DC JPEG2000 Parsing Use-After-Free Information Disclosure Vulnerability

CVE-2021-40730 is fixed in Adobe Acrobat Reader DC on 1 platform by Adobe Acrobat Reader DC 21.007.20099 (version 21.007.20099), released October 5, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-40730
- Priority: Routine
- CVSS: 3.3
- EPSS: 0.0390
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 15, 2021
- Weakness: CWE-416: Use After Free (CWE-416)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-40730

## Description

Adobe Acrobat Reader DC version 21.007.20095 (and earlier), 21.007.20096 (and earlier), 20.004.30015 (and earlier), and 17.011.30202 (and earlier) is affected by a use-after-free that allow a remote attacker to disclose sensitive information on affected installations of of Adobe Acrobat Reader DC. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of JPG2000 images.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Adobe Acrobat Reader DC | 21.007.20099 | [Adobe Acrobat Reader DC 21.007.20099](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.32-bit-21.007.20099.md) | Oct 5, 2021 |

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Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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