CVE-2021-39839
Last modified
CVE-2021-39839 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability in the processing of the AcroForm getItem action that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.. EPSS estimates a 64.30% chance of exploitation in the next 30 days.
Description
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability in the processing of the AcroForm getItem action that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Metrics
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Adobe | Acrobat | >= 20.001.30005, <= 20.004.30006 |
| Adobe | Acrobat Reader | >= 20.001.30005, <= 20.004.30006 |
| Adobe | Acrobat Dc | >= 15.008.20082, <= 21.005.20058 |
| Adobe | Acrobat Reader Dc | >= 15.008.20082, <= 21.005.20058 |
| Adobe | Acrobat Dc | >= 15.008.20082, <= 21.005.20060 |
| Adobe | Acrobat Reader Dc | >= 15.008.20082, <= 21.005.20060 |
| Adobe | Acrobat | >= 17.011.30059, <= 17.011.30199 |
| Adobe | Acrobat Reader | >= 17.011.30059, <= 17.011.30199 |
References
- https://helpx.adobe.com/security/products/acrobat/apsb21-55.htmlRelease Notes, Vendor Advisory
- https://helpx.adobe.com/security/products/acrobat/apsb21-55.htmlRelease Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Related CVEs from 2021
- CVE-2021-39833Adobe Framemaker versions 2019 Update 8 (and earlier) and 20…3.3
- CVE-2021-39834Adobe Framemaker versions 2019 Update 8 (and earlier) and 20…3.3
- CVE-2021-39835Adobe Framemaker versions 2019 Update 8 (and earlier) and 20…4.3
- CVE-2021-39836Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…7.8
- CVE-2021-39837Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…7.8
- CVE-2021-39838Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…7.8
- CVE-2021-3984vim is vulnerable to Heap-based Buffer Overflow7.8
- CVE-2021-39840Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…7.8
- CVE-2021-39841Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…7.8
- CVE-2021-39842Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…7.8
- CVE-2021-39843Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…7.8
- CVE-2021-39844Acrobat Reader DC versions 2021.005.20060 (and earlier), 202…3.3
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