CVE-2020-25111

9.8 criticalEPSS 21%

Critical (9.8) in contiki-os contiki-os. EPSS 21% chance of exploitation in the next 30 days.

An issue was discovered in the IPv6 stack in Contiki through 3.0. There is an insufficient check for the IPv6 header length. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 21% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2020-12-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

contiki-os:contiki-os

References

https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
https://www.kb.cert.org/vuls/id/815128
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
https://www.kb.cert.org/vuls/id/815128

Check your stack JSON