Home/CVE/Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) a
CVE

CVE-2021-39842

Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) a

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.

HIGH · CVSS 7.8 EPSS 0.45461
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules15 YARA rules0
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Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

8
adobe acrobat>= 20.001.30005 and <= 20.004.30006
adobe acrobat reader>= 20.001.30005 and <= 20.004.30006
adobe acrobat dc>= 15.008.20082 and <= 21.005.20058
adobe acrobat reader dc>= 15.008.20082 and <= 21.005.20058
adobe acrobat dc>= 15.008.20082 and <= 21.005.20060
adobe acrobat reader dc>= 15.008.20082 and <= 21.005.20060
adobe acrobat>= 17.011.30059 and <= 17.011.30199
adobe acrobat reader>= 17.011.30059 and <= 17.011.30199
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Sigma Hunt Rules

15
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.0 · psirt@adobe.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD29 Sep 2021 · 04:15 PM
CVSS VectorCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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Vendor Advisories

1
adobe-psirtAPSB21-55
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