CVE-2021-21089 json
Adobe Acrobat Reader DC URI Parsing Out-Of-Bounds Read
published 2021-09-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8480
- cvss
- 3.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.9%
- EPSS 1.9% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an out-of-bounds Read vulnerability. An unauthenticated attacker could leverage this vulnerability to locally escalate privileges in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Exploit prediction
1.87% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Affected products
- Adobe Acrobat Reader
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
helpx.adobe.com
/security/products/acrobat/apsb21-09.html
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-21089
- NVD CVE-2021-21089
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.