Vulnerability · Published Sep 29, 2021 · Assigned by adobe
CVE-2021-39842Adobe Acrobat Reader DC messageHandler.OnMessage Use-After-Free Vulnerability
High 7.8
In plain English
A high-severity use-after-free in Acrobat Reader from Adobe. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 17.4% (higher than 97% of all known vulnerabilities).
Severity (CVSS 3.0)7.8High
Exploit odds (30 days)17.4%top 2.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 result in 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Adobe | Acrobat Reader | unspecified – through DC 2021 Julyunspecified – through 20.0-Classic 2021 Julyunspecified – through 17.0-Classic 2021 Julyunspecified – through None |
Weakness: CWE-416 · Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://helpx.adobe.com/security/products/acrobat/apsb21-55.html x_refsource_MISC