CVE-2021-21017
Last modified
CVE-2021-21017 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 86.21% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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 |
References
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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