Vulnerability Details : CVE-2021-39838

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 in the processing of the AcroForm buttonGetCaption action 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.
Published 2021-09-29 16:15:09
Updated 2021-10-06 23:04:10
Source Adobe Systems Incorporated
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Exploit prediction scoring system (EPSS) score for CVE-2021-39838

EPSS FAQ
11.59%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 95 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-39838

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.8
 MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
 NIST
7.8
 HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
1.8
5.9
 Adobe Systems Incorporated

CWE ids for CVE-2021-39838

  • The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
    Assigned by: psirt@adobe.com (Primary)

References for CVE-2021-39838

Products affected by CVE-2021-39838

  • Adobe » Acrobat Reader » Classic Edition
    Versions from including (>=) 20.001.30005 and up to, including, (<=) 20.004.30006
    cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*
    Matching versions
    When used together with: Apple » Macos » Version: N/A
    When used together with: Microsoft » Windows » Version: N/A
  • Adobe » Acrobat Reader » Classic Edition
    Versions from including (>=) 17.011.30059 and up to, including, (<=) 17.011.30199
    cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*
    Matching versions
    When used together with: Apple » Macos » Version: N/A
    When used together with: Microsoft » Windows » Version: N/A
  • Adobe » Acrobat » Classic Edition
    Versions from including (>=) 20.001.30005 and up to, including, (<=) 20.004.30006
    cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*
    Matching versions
    When used together with: Apple » Macos » Version: N/A
    When used together with: Microsoft » Windows » Version: N/A
  • Adobe » Acrobat » Classic Edition
    Versions from including (>=) 17.011.30059 and up to, including, (<=) 17.011.30199
    cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*
    Matching versions
    When used together with: Apple » Macos » Version: N/A
    When used together with: Microsoft » Windows » Version: N/A
  • Adobe » Acrobat Dc » Continuous Edition
    Versions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20058
    cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
    Matching versions
    When used together with: Apple » Macos » Version: N/A
  • Adobe » Acrobat Dc » Continuous Edition
    Versions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20060
    cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
    Matching versions
    When used together with: Microsoft » Windows » Version: N/A
  • Adobe » Acrobat Reader Dc » Continuous Edition
    Versions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20058
    cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*
    Matching versions
    When used together with: Apple » Macos » Version: N/A
  • Adobe » Acrobat Reader Dc » Continuous Edition
    Versions from including (>=) 15.008.20082 and up to, including, (<=) 21.005.20060
    cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*
    Matching versions
    When used together with: Microsoft » Windows » Version: N/A
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