CVE-2020-10063

Remote Denial of Service in CoAP Option Parsing Due To Integer Overflow

6.8 Medium

A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.80%Unchanged since Apr 14, 2021

What each source reports

CVE List Score used 6.8

Remote Denial of Service in CoAP Option Parsing Due To Integer Overflow

Record: CVE-2020-10063
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness: CWE-190
Updated: 2026-11-02

EUVDEUVD-2020-2528 6.8

Record: EUVD-2020-2528
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-x97p-2r85-4gq4 No score

A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able...

Record: GHSA-x97p-2r85-4gq4
Updated: 2026-11-02

NVD 6.8

Record: CVE-2020-10063
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-190
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-10063 is a medium vulnerability (CVSS 6.8) in Zephyrproject Zephyr, published June 5, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.80%, the 78th percentile. No source names a fixed version.