CVE-2021-28550

8.8 highKEVEPSS 52%

High (8.8) in Adobe Acrobat and Reader. In CISA KEV since 2021-11-03. EPSS 52% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 52% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2021-11-03, due 2021-11-17
CWE: CWE-416
Published: 2021-09-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

adobe:acrobat
adobe:acrobat_dc
adobe:acrobat_reader
adobe:acrobat_reader_dc

References

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