CVE-2021-3625

Public Exploit
Buffer overflow in Zephyr USB DFU DNLOAD

Description

Buffer overflow in Zephyr USB DFU DNLOAD. Zephyr versions >= v2.5.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c3gr-hgvr-f363

Categories

9.6
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 5.56% Top 15%
Third-Party Advisory github.com
Affected: zephyrproject-rtos zephyr
Published at:
Updated at:

References

Link Tags
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c3gr-hgvr-f363 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-3625?
CVE-2021-3625 has been scored as a critical severity vulnerability.
How to fix CVE-2021-3625?
To fix CVE-2021-3625, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3625 being actively exploited in the wild?
It is possible that CVE-2021-3625 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3625?
CVE-2021-3625 affects zephyrproject-rtos zephyr.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.