Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N R C H H H 9.6 .5185 98.9 YES
AFFECTED Product Versions Fixed Acrobat Reader unspecified – —
TIMELINE Mar 16 Reserved by adobe Sep 2 Published (CNA: adobe) Nov 3 Added to CISA KEV, remediation due 2021-11-17
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.
| Date | Event | Detail |
|---|---|---|
| March 16, 2021 | Reserved | Reserved by adobe |
| September 2, 2021 | Published | Published (CNA: adobe) |
| November 3, 2021 | KEV ADDED | Added to CISA KEV, remediation due 2021-11-17 |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Adobe | Acrobat Reader | — | unspecified | — |
Authoritative record: CVE-2021-28550 at cve.org
Vendors: adobe
Weaknesses: CWE-416
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-28550 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
