Vulnerability Details : CVE-2021-39845
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a stack overflow vulnerability due to insecure handling of a crafted PDF file, potentially resulting in memory corruption in the context of the current user. Exploitation requires user interaction in that a victim must open a crafted PDF file in Acrobat Reader.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-39845
- Adobe » Acrobat Reader » Classic EditionVersions from including (>=) 20.001.30005 and up to, including, (<=) 20.004.30006cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*
- Adobe » Acrobat Reader » Classic EditionVersions from including (>=) 17.011.30059 and up to, including, (<=) 17.011.30199cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*
- Adobe » Acrobat » Classic EditionVersions from including (>=) 20.001.30005 and up to, including, (<=) 20.004.30006cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*
- Adobe » Acrobat » Classic EditionVersions from including (>=) 17.011.30059 and up to, including, (<=) 17.011.30199cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*
- Adobe » Acrobat Dc » Continuous EditionVersions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20058cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
- Adobe » Acrobat Dc » Continuous EditionVersions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20060cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
- Adobe » Acrobat Reader Dc » Continuous EditionVersions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20058cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*
- Adobe » Acrobat Reader Dc » Continuous EditionVersions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20060cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-39845
0.21%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 58 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-39845
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:P |
8.6
|
4.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H |
1.8
|
4.2
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H |
1.8
|
4.2
|
Adobe Systems Incorporated |
CWE ids for CVE-2021-39845
-
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: psirt@adobe.com (Primary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Secondary)
References for CVE-2021-39845
-
https://helpx.adobe.com/security/products/acrobat/apsb21-55.html
Adobe Security BulletinRelease Notes;Vendor Advisory
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