What is CVE-2021-41061?

CVE-2021-41061 is a medium-severity vulnerability in Riot-Os Riot, classified under Use of Insufficiently Random Values. CVSS score: 5.5/10. Published 2021-09-15.

How severe is CVE-2021-41061?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-41061 known to be exploited?

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

Vulnerability in Riot-Os Riot

CVE-2021-41061

In RIOT-OS 2021.01, nonce reuse in 802.15.4 encryption in the ieee820154_security component allows attackers to break encryption by triggering reboots.

Published 2021-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Riot-Os Riot — versions 2021.01

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

github.com/RIOT-OS/RIOT/issues/16844 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-41061?: CVE-2021-41061 is a medium-severity vulnerability in Riot-Os Riot, classified under Use of Insufficiently Random Values. CVSS score: 5.5/10. Published 2021-09-15.
How severe is CVE-2021-41061?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-41061 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.