CVE-2021-42859
CVSS v3
7.5
HIGH
EPSS Score
1.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A memory leak issue was discovered in Mini-XML v3.2 that could cause a denial of service. NOTE: testing reports are inconsistent, with some testers seeing the issue in both the 3.2 release and in the October 2021 development code, but others not seeing the issue in the 3.2 release
Technical details
- Published
- 2022-05-26
Frequently asked questions
What is CVE-2021-42859?
A memory leak issue was discovered in Mini-XML v3.2 that could cause a denial of service. NOTE: testing reports are inconsistent, with some testers seeing the issue in both the 3.2 release and in the October 2021 development code, but others not seeing the issue in the 3.2 release
Is CVE-2021-42859 actively exploited?
Active exploitation of CVE-2021-42859 has not been confirmed. Its EPSS score was 1.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-42859?
CVE-2021-42859 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-42859 affecting your environment?
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