CVE-2021-34430
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
Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.
Technical details
- Published
- 2021-07-08
Frequently asked questions
What is CVE-2021-34430?
Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.
Is CVE-2021-34430 actively exploited?
Active exploitation of CVE-2021-34430 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-2021-34430?
CVE-2021-34430 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-34430 affecting your environment?
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