CVE-2021-28550

HIGH CISA KEV
Published Sep 2, 20214y ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
High
Find Similar
Published Sep 2, 2021 4y ago
Last Modified Jun 17, 2026 2w ago
KEV Listed Nov 3, 2021 4y ago
KEV Due Nov 17, 2021 1692d overdue

Description

Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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.

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

CISA Known Exploited Overdue 1692d
Added
Nov 3, 2021
Due
Nov 17, 2021

Apply updates per vendor instructions.

Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 12

VendorProductVersionRange
adobeacrobat_dc*≥15.008.20082  –  ≤21.001.20150
adobeacrobat_reader_dc*≥15.008.20082  –  ≤21.001.20150
microsoftwindows*any
adobeacrobat*≥17.011.30059  –  ≤17.011.30194
adobeacrobat*≥20.001.30005  –  ≤20.001.30020
adobeacrobat_reader*≥17.011.30059  –  ≤17.011.30194
adobeacrobat_reader*≥20.001.30005  –  ≤20.001.30020
applemacos*any
microsoftwindows*any
adobeacrobat_dc*≥15.008.20082  –  ≤21.001.20149
adobeacrobat_reader_dc*≥15.008.20082  –  ≤21.001.20149
applemacos*any

References 2

  • helpx.adobe.com https://helpx.adobe.com/security/products/acrobat/apsb21-29.html
    Release NotesVendor Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28550
    Third Party AdvisoryUS Government Resource

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.