CVE-2021-39858 is an out-of-bounds read vulnerability affecting Adobe Acrobat Reader DC versions 2021.005.20060 and earlier, 2020.004.30006 and earlier, and 2017.011.30199 and earlier, across Adobe, Apple, and Microsoft platforms. This low-severity vulnerability (CVSS 3.3) requires user interaction, specifically opening a malicious file, and could lead to the disclosure of arbitrary memory information in the context of the current user. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and it is not listed in CISA's KEV catalog. Despite low EPSS and FAUCET scores, it has received some community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 20.006.20034, <= 21.005.20060CPE matchmatch criteria | cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* | ||
>= 20.006.20034, <= 21.005.20058CPE matchmatch criteria | cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* | ||
>= 20.006.20034, <= 21.005.20060CPE matchmatch criteria | cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* | ||
>= 17.011.30158, <= 17.011.30199CPE matchmatch criteria | cpe:2.3:a:adobe:acrobat_2017:*:*:*:*:classic_2017:*:*:* | ||
>= 17.011.30158, <= 17.011.30199CPE matchmatch criteria | cpe:2.3:a:adobe:acrobat_reader_2017:*:*:*:*:classic_2017:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.0 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.