CVE-2021-39859 json
Use After Free Adobe Acrobat Pro DC [HB-21-0339]
published 2023-09-06 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26216
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- adobe acrobat 17.011.30202, 20.004.30015
- adobe acrobat_reader 17.011.30202, 20.004.30015
Exploit prediction
0.48% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Affected products
- Adobe Acrobat Reader
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
helpx.adobe.com
/security/products/acrobat/apsb21-55.html
vendor-advisory
Sources
- CVE List CVE-2021-39859
- NVD CVE-2021-39859
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