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CVE-2021-21017: Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability
Adobe Acrobat and Reader · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
86.33%EPSS exploit probability (30 days) 99.7th percentile
8.8 HIGHCVSS 3.1
Unknownknown ransomware use
265days from NVD publication to KEV
What it is
Acrobat Acrobat and Reader contain a heap-based buffer overflow vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-122 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD published | 2021-02-11 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-21017.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.