Vulnerability · Published Oct 7, 2021 · Assigned by adobe

CVE-2021-40726Adobe Acrobat Reader DC AcroForm Field Use-After-Free Remote Code Execution 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 5.3% (higher than 93% of all known vulnerabilities).

Severity (CVSS 3.0)7.8High

Exploit odds (30 days)5.3%top 7.4% 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 when processing AcroForm field that could result in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

Affected products (as reported)

Vendor	Product	Versions
Adobe	Acrobat Reader	unspecified – through 2020.004.30006unspecified – through 2017.011.30199unspecified – through 2021.005.20060unspecified – 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
https://www.zerodayinitiative.com/advisories/ZDI-21-1249/ x_refsource_MISC