CVE-2021-39859
Last modified
CVE-2021-39859 is a medium-severity vulnerability rated 5.5/10 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 that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. EPSS estimates a 0.42% 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 that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Adobe | Acrobat Dc | >= 15.007.20033, <= 21.005.20060 |
| Adobe | Acrobat Reader Dc | >= 15.007.20033, <= 21.005.20060 |
| Adobe | Acrobat Dc | >= 15.007.20033, <= 21.005.20058 |
| Adobe | Acrobat Reader Dc | >= 15.007.20033, <= 21.005.20058 |
| Adobe | Acrobat | >= 17.011.30180, < 17.011.30202 |
| Adobe | Acrobat | >= 20.001.30005, < 20.004.30015 |
| Adobe | Acrobat Reader | >= 17.011.30180, < 17.011.30202 |
| Adobe | Acrobat Reader | >= 20.001.30005, < 20.004.30015 |
References
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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