CVEvulnerability
CVE-2021-21017
CISA Known Exploited Vulnerability
Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability — Adobe Acrobat and Reader
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.
- Added to KEV
- 2021-11-03
- Remediation due
- 2021-11-17
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
- Notes
- https://nvd.nist.gov/vuln/detail/CVE-2021-21017
- Status
- Analyzed
- Published
- 2021-02-11
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-122, CWE-787
Description
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow 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.
Affected configurations
• adobe acrobat (>= 17.0 <= 17.011.30188)
• adobe acrobat (>= 20.0 <= 20.001.30018)
• adobe acrobat dc (<= 20.013.20074)
• adobe acrobat reader (>= 17.0 <= 17.011.30188)
• adobe acrobat reader (>= 20.0 <= 20.001.300183)
• adobe acrobat reader dc (<= 20.013.20074)
Related
References
- https://helpx.adobe.com/security/products/acrobat/apsb21-09.html Vendor Advisory
- https://helpx.adobe.com/security/products/acrobat/apsb21-09.html Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017 Third Party Advisory, US Government Resource