CVE-2021-3516
CVSS v3
7.8
HIGH
EPSS Score
2.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.
Technical details
- Published
- 2021-06-01
Frequently asked questions
What is CVE-2021-3516?
There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.
Is CVE-2021-3516 actively exploited?
Active exploitation of CVE-2021-3516 has not been confirmed. Its EPSS score was 2.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-3516?
CVE-2021-3516 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-3516 affecting your environment?
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