Use After Free in Foxitsoftware Foxit Reader
CVE-2021-21822
A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 10.1.3.37598. A specially crafted PDF document can trigger the reuse of previously free memory, which can lead to arbitrary code execution. An attacker needs to trick the user into opening a malicious file or site to trigger this vulnerability if the browser plugin extension is enabled.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.018 (77.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: -0.000
Affected products
- Foxitsoftware Foxit Reader — versions 10.1.3.37598
- Foxit — versions Foxit Reader 10.1.3.37598
Weakness classification (CWE)
Public proof-of-concept exploits
References
- talosintelligence.com/vulnerability_reports/TALOS-2021-1287 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21822?
- CVE-2021-21822 is a high-severity vulnerability in Foxitsoftware Foxit Reader, classified under Use After Free. CVSS score: 8.8/10. Published 2021-05-10.
- How severe is CVE-2021-21822?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-21822 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.