What is CVE-2021-41040?

CVE-2021-41040 is a high-severity vulnerability in Eclipse Wakaama, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2022-02-01.

How severe is CVE-2021-41040?

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

Is CVE-2021-41040 known to be exploited?

10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Out-of-bounds Read in Eclipse Wakaama

CVE-2021-41040

In Eclipse Wakaama, ever since its inception until 2021-01-14, the CoAP parsing code does not properly sanitize network-received data.

Vulnerability class: Buffer Overflow

Published 2022-02-01 · 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: 0.014 (70.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Eclipse Wakaama — versions 1.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

References

bugs.eclipse.org/bugs/show_bug.cgi (Exploit, Patch, Issue Tracking, Vendor Advisory)
github.com/eclipse/wakaama/pull/640 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-41040?: CVE-2021-41040 is a high-severity vulnerability in Eclipse Wakaama, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2022-02-01.
How severe is CVE-2021-41040?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-41040 known to be exploited?: 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.