CVE-2021-28966
CVSS v3
7.5
HIGH
EPSS Score
57.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir.
Technical details
- Published
- 2021-07-30
Frequently asked questions
What is CVE-2021-28966?
In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir.
Is CVE-2021-28966 actively exploited?
Active exploitation of CVE-2021-28966 has not been confirmed. Its EPSS score was 57.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-28966?
CVE-2021-28966 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-28966 affecting your environment?
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