Vulnerability · Published Sep 29, 2021 · Assigned by adobe

CVE-2021-39857Adobe Acrobat Reader DC Information Disclosure via ActiveX LoadFile

Medium 4.3

In plain English

A medium-severity information exposure 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 2.5% (higher than 85% of all known vulnerabilities).

Severity (CVSS 3.0)4.3Medium

Exploit odds (30 days)2.5%top 15.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Adobe Acrobat Reader DC add-on for Internet Explorer versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to check for existence of local files. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.

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-200 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

References

https://helpx.adobe.com/security/products/acrobat/apsb21-55.html x_refsource_MISC