# CVE-2020-24428: Acrobat Reader DC for macOS Race Condition Vulnerability Could Lead to Privilege Escalation

CVE-2020-24428 is fixed in Adobe Acrobat Reader DC on 1 platform by Adobe Acrobat Reader DC 21.001.20155 (version 21.001.20155), released April 27, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-24428
- Priority: High
- CVSS: 7.7
- EPSS: 0.0226
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 5, 2020
- Weakness: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-24428

## Description

Acrobat Reader DC versions 2020.012.20048 (and earlier), 2020.001.30005 (and earlier) and 2017.011.30175 (and earlier) for macOS are affected by a time-of-check time-of-use (TOCTOU) race condition vulnerability that could result in local privilege escalation. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Adobe Acrobat Reader DC | 21.001.20155 | [Adobe Acrobat Reader DC 21.001.20155](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.32-bit-21.001.20155.md) | Apr 27, 2021 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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