CVE-2020-27222

7.5 highEPSS 0.9%

High (7.5) in eclipse californium. EPSS 0.9% chance of exploitation in the next 30 days.

In Eclipse Californium version 2.3.0 to 2.6.0, the certificate based (x509 and RPK) DTLS handshakes accidentally fails, because the DTLS server side sticks to a wrong internal state. That wrong internal state is set by a previous certificate based DTLS handshake failure with TLS parameter mismatch. The DTLS server side must be restarted to recover this. This allow clients to force a DoS.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
CWE: CWE-372
Published: 2021-02-03
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

eclipse:californium

References

https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844
https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844

Check your stack JSON