What is CVE-2020-13988?

CVE-2020-13988 is a high-severity vulnerability in Contiki-Ng, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2020-12-11.

How severe is CVE-2020-13988?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Contiki-Ng

CVE-2020-13988

An issue was discovered in Contiki through 3.0. An Integer Overflow exists in the uIP TCP/IP Stack component when parsing TCP MSS options of IPv4 network packets in uip_process in net/ipv4/uip.c.

Vulnerability class: Integer Overflow

Published 2020-12-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.040 (90.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.039 · newest: 0.040 · change: +0.000

Affected products

Contiki-Ng

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

www.kb.cert.org/vuls/id/815128 (US Government Resource, Third Party Advisory)
us-cert.cisa.gov/ics/advisories/icsa-20-343-01 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13988?: CVE-2020-13988 is a high-severity vulnerability in Contiki-Ng, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2020-12-11.
How severe is CVE-2020-13988?: High severity. CVSS v3 base score is 7.5 out of 10.