What is CVE-2021-40523?

CVE-2021-40523 is a high-severity vulnerability in Contiki-os Contiki, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2021-09-05.

How severe is CVE-2021-40523?

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

Vulnerability in Contiki-os Contiki

CVE-2021-40523

In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the server may fail to give the WILL/WONT or DO/DONT response for DO and WILL commands because of improper handling of exception con…

EPSS: 0.010 (58.0th percentile) — read the EPSS interpretation.

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.

Affected products

Contiki-os Contiki — versions 3.0
N/a — versions n/a

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-40523?: CVE-2021-40523 is a high-severity vulnerability in Contiki-os Contiki, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2021-09-05.
How severe is CVE-2021-40523?: High severity. CVSS v3 base score is 7.5 out of 10.