CVE-2021-21017
Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Acrobat and Reader, fix it now.
CISA required action: Apply updates per vendor instructions.
US federal civilian agencies must remediate by Nov 17, 2021.
Patch status
No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Source |
|---|---|---|---|
| Acrobat | Adobe | >= 17.0, <= 17.011.30188; >= 20.0, <= 20.001.30018 | NVD |
| Acrobat and Reader | Adobe | — | KEV |
Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2021-21017 scored CVSS 8.8: Adobe Acrobat and Reader, Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability
CISA lists this as exploited in the wild. Unpatched Acrobat and Reader systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
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Coverage
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