CVE-2021-28635 in the critical feed json
Adobe Acrobat Reader Use-After-Free Vulnerability
published 2021-08-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15304
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 51.2%
- EPSS 51.2% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by a use-after-free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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.
Patch / fix
Exploit prediction
51.18% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Adobe Acrobat Reader
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
helpx.adobe.com
/security/products/acrobat/apsb21-51.html
patch, vendor-advisory
Sources
- CVE List CVE-2021-28635
- NVD CVE-2021-28635
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.